Issue-660 - June 05, 2017   Recommend
Press Releases Patents Technical Papers
BASF to increase prices for butanediol and derivatives in Europe

With immediate effect, or as existing contracts permit, BASF SE will increase its European selling prices for the following products:1,4-Butanediol (BDO): + 200 EUR/mtTetrahydrofuran (THF): + 150 EUR/mtPolytetramethylene ether glycol (PolyTHF ): + 300 EUR/mtN-Methyl-2-Pyrrolidone (NMP): + 150 EUR/mtGamma Butyrolactone (GBL): + 150 EUR/mtBDO and its...

Company name: BASF
Published On: Friday June 02nd, 2017

Ringier honors BYK with two innovation awards

BYK is delighted to have received two accolades from China: Ringier Trade Media, the publisher of "Coatings and Inks China", has recognized BYK in the categories "2017 Ringier Technology Innovation Awards - Coatings Industry" and "Innovators of the Year". The public and jury, comprising seven experts from the Chinese coatings industry, was...

Company name: BYK-Chemie
Published On: Wednesday May 31st, 2017

Stepan Announces Polyol Price Increase for North America June 15, 2017

Effective June 15, 2017 or as contracts allow, Stepan Company will increase prices for all STEPANPOL Rigid Polyester Polyols in North America by $0.14 per pound. The increase is necessary due to rising raw material costs.

Company name: Stepan Company
Published On: Friday June 02nd, 2017

Middle East isocyanates, polyols demand muted amid Ramadan

Demand for isocyanates and polyols in the Middle East has entered a seasonally weak period amid the Muslim fasting month of Ramadan, which started on 27 May.Spot prices of polymeric methyl di-p-phenylene isocyanate (PMDI) and toluene di-isocyanate (TDI) will likely continue to ease as demand wanes further through the month, market sources...

Company name: ICIS Chemical Business
Published On: Friday June 02nd, 2017

Sadara first PMDI facility starts

PMDI, which is used in the production of polyurethane, is one of several specialized chemical and plastics products that Sadara is producing in Saudi Arabia for the first time. The start-up of the PMDI plant comes just five months after the completion of its mechanical phase.Commenting on the announcement, CEO Ziad Al-Labban said: "Starting up the...

Company name: Sadara Chemical Company
Published On: Friday June 02nd, 2017

Eurofoam: Portfolio expansion at Eurofoam Romania

Eurofoam successfully started the production of rolls of polyurethane foam at its site in Sibiu, Romania in April 2017. This is Eurofoam's third site - besides Linz in Austria and Zgierz in Poland - manufacturing rolls from long blocks of polyurethane foam.Eurofoam Romania is now able to offer rolls with a width of up to 2,20 m and a length of up...

Company name: Eurofoam
Published On: Wednesday May 31st, 2017

Akzo Nobel opens new Performance Coatings facility in Thailand

Responding to current and expected production needs for Thailand and South East Asia region, Akzo Nobel has opened a new Performance Coatings production facility in Chonburi, Thailand.With an investment of EUR31 million, Akzo Nobel expands its footprint with this ninth production site in the South East Asia region. The new site will help to better...

Company name: Akzo Nobel
Published On: Wednesday May 31st, 2017

Ranking: Europe's 25 largest coating manufacturers

Who scores first place in Europe? European Coatings has listed the largest 25 paint and coatings producing enterprises which are headquartered in Europe.Akzo Nobel remains the largest player in Europe. The ranking only considers paint and coatings producers that have their headquarters on the European continent. Relevant for the ranking are the...

Company name:
Published On: Tuesday May 30th, 2017

Why it's important to choose environmentally friendly spray foam

Though spray foam insulation may seem like an expensive or intimidating project to take on, with our team of specialists at Demilec, it doesn't have to be. Not only can using eco-friendly spray foam save you money in the long run, it can help save many resources and prevent future problems from arising in your home due to mold, over use of your...

Company name: Demilec
Published On: Friday June 02nd, 2017

Hybrid's Fortune 500 Partner Launches New Product Based On Green Polyurethane Technology

Hybrid Coating Technologies Inc. is pleased to announce that its partner, PPG-Comex, recently launched a second coating product using Hybrid's non isocyanate hardener. "We are very pleased that our partner has launched a second product using our hardener," said Joseph Kristul President and CEO, "This demonstrates the ability of our partners to...

Company name: Hybrid Coating Technologies
Published On: Wednesday May 31st, 2017

Jotun increases sales in a demanding market

Jotun's results for the first four months of the year are characterised by good growth in the Decorative Paints segment but difficult conditions in the shipbuilding and offshore markets. An increase in raw material prices and the negative effects of currency exchange rates also contribute to a weaker result compared to last year.Jotun's operating...

Company name: Jotun Paints
Published On: Friday June 02nd, 2017

Soudal announces acquisition of adhesives producer Mitol

Soudal is proud to announce the acquisition of Slovenia based adhesive manufacturer Mitol. The company has a turnover of 17 million euro and a product portfolio of more than 500 high-quality technical adhesives, further strengthening Soudal's position on the industrial adhesives market.Mitol was founded in 1947 in the Slovenian town of Sezana,...

Company name: Soudal
Published On: Friday June 02nd, 2017

APS TPU Price Increase

Due to the considerable price increased in the raw materials market, we are forced to revise our products' prices effective July 1, 2017. These increases have affected all raw materials across the board, as a consequence, all our products as a whole. Therefore, prices will be increase as follows:■ Zythane TPU 4000-Series and 5000-Series...

Company name: APS Elastomers
Published On: Wednesday May 31st, 2017

Krauss-Maffei hosts tech day at its Michigan location

Krauss-Maffei Corp., the U.S. subsidiary of the KraussMaffei Group with headquarters in Florence, Ky., hosted its first Tech Day at the company's Brighton, Mich., location on May 18th. The event was the first of its kind at the company's Michigan location and welcomed over 100 guests."Tech Day was a great success. The turnout was more than...

Company name: KraussMaffei
Published On: Wednesday May 31st, 2017

FRIMO Mexico TechDay and Grand Opening - June 22, 2017 Puebla, Mexico

Join FRIMO in celebrating our expansion to Mexico by attending our grand opening, which will be combined with our first ever FRIMO Mexico TechDay! This TechDay will feature some of FRIMO's technological experts giving a general overview of FRIMO technologies, and speeches from OEM and Tier 1 guest speakers on the current status of the automotive...

Company name: Frimo
Published On: Thursday June 01st, 2017

Dopag corporate presentation (Wind energy)

OSV presents to your attention the corporate presentation of one of OSV partners - Dopag company (Switzerland). This presentation is devoted to dosing and mixing systems for the production of wind turbine blades.

Company name: OSV Technologiya
Published On: Thursday June 01st, 2017

Master-PUR Performance & Master-PUR Inline - now stronger even longer!

Good news for customers of the Master-PUR Performance und Master-PUR Inline hose series: These unique and completely abrasion-resistant suction and transport hoses are now being produced in longer versions - up to 15 and 20 metre lengths. The standard lengths are naturally still available and complete this extended range. MASTERFLEX has introduced...

Company name: Masterflex
Published On: Tuesday May 30th, 2017

Dissipating static electricity in urethane rollers and wheels

Static electricity is an invisible field of protons, neutrons, and electrons found in anything that has potential to move. Each atom has its own properties and characteristics. One of these properties is an electrical charge. Protons have what is called a "positive" (+) charge, which is the root of static electricity buildup in urethane products....

Company name: Plan Tech
Published On: Friday June 02nd, 2017

Lubrizol Names New Distributors for Engineered Polymers

The Lubrizol Corporation announces new partnerships with distributors, Al-Shihab Al Thahabi and Al Azzaz, based in UAE and Saudi Arabia, respectively.Al-Shihab Al Thahabi will distribute the Lubrizol Engineered Polymers portfolio for solvent-based adhesives and elastomer applications in the following countries: Kuwait, Oman, Qatar and United Arab...

Company name: Lubrizol Engineered Polymers
Published On: Monday June 05th, 2017

Russian EuroChem, ChemChina Intend to Start Joint Production in Russia

Russia's EuroChem Group and the Chinese National Chemical Corporation (ChemChina) signed a memorandum of intent to establish joint industrial production of thus-far imported propylene oxides and isocyanates in Russia during the Saint Petersburg International Economic Forum (SPIEF), EuroChem CEO Dmitry Strezhnev said on Thursday.The production plans...

Company name: EuroChem
Published On: Friday June 02nd, 2017

Emery Oleochemicals Receives 2017 Award for Excellence in Environmental, Health, Safety & Security...

Emery Oleochemicals, a global specialty chemical manufacturer, received a 2017 Award for Excellence in Health and Safety Performance from the Ohio Chemistry Technology Council (OCTC) in recognition of its new Safety Leadership System.In 2016, Emery instituted a new Safety Leadership System at its Cincinnati, Ohio plant designed to get its...

Company name: Emery Oleochemicals
Published On: Thursday June 01st, 2017

PPG announces decision to withdraw proposal and not pursue offer for AkzoNobel

PPG today announced that it has withdrawn its proposal to combine with AkzoNobel and will not pursue a public offer for all the issued and outstanding shares of AkzoNobel. PPG made the final decision today after careful consideration, including the stakeholder interests of both companies.We were hopeful throughout this process that AkzoNobel's...

Company name: PPG Industries
Published On: Friday June 02nd, 2017

BASF presents 'Material Selection 17/18'

Material Selection 17/18' is the second material trend book by BASF that offers a global perspective on trends and materials. It presents innovative plastics solutions that help customers face these trends. The trend book was developed jointly by the designfabrik experts in Tokyo, Shanghai and Ludwigshafen.The trend researchers and designers of the...

Company name: BASF
Published On: Wednesday May 31st, 2017

PPG Honors Nine Excellent Suppliers, Including First Supplier Sustainability Award Winner

PPG has announced nine Excellent Supplier Award recipients for superior performance in 2016, including its first Supplier Sustainability Award winner. The new PPG Supplier Sustainability Award recognizes a supplier that demonstrates an industry-leading sustainability and safety culture and that is helping PPG meet its 2020 sustainability goals...

Company name: PPG Industries
Published On: Tuesday May 30th, 2017

CEO Patrick Thomas takes over interim CFO responsibilities at Covestro

CEO Patrick Thomas will assume the role of interim CFO following the resignation of Frank H. Lutz. Patrick Thomas has an excellent reputation within the capital markets based on his long-standing financial and industry expertise, particularly since Covestro's successful IPO under his leadership in 2015.Dr. Richard Pott, Chairman of the Supervisory...

Company name: Covestro
Published On: Monday June 05th, 2017

Innocor names Wagner SVP

Innocor, a producer of polyurethane foam products, said Bill Wagner has joined the company as senior vice president of Innocor Foam Technologies. In that role, he will lead the organization's commercial division.Wagner joins Innocor after 28 years at Rohm and Haas and Dow, most recently as the global business director of the Dow Construction...

Company name: Innocor
Published On: Wednesday May 31st, 2017

Sika: Paul Schuler succeeds Jan Jenisch as CEO

Sika has appointed Paul Schuler, currently Regional Manager Europe Middle East Africa (EMEA), as Chief Executive Officer as of July 1, 2017.He succeeds Jan Jenisch who has accepted to become the new CEO at LafargeHolcim.About Paul SchulerPaul Schuler has been with Sika for 29 years and has been a member of the Group Management since 2007. He served...

Company name: Sika Technology AG
Published On: Wednesday May 31st, 2017

HEUR thickener and process for its preparation

The present invention is a process for preparing an aqueous solution of a hydrophobically modified alkylene oxide poly(urethane-urea-allophanate) thickener by contacting isocyanate reactive groups with a stoichiometric excess of a diisocyanate, followed by reaction with water. The thickener surprisingly shows a maintenance or improvement in hiding...

Company name: Rohm and Haas Company
Published On: Friday June 02nd, 2017

Internal mold release agents for polyurethane materials

An internal mold release agent (IMRA) which effectively releases a cured polyurethane (PU) material from a metal, in particular steel, mold. The IMRA is a surface active agent containing phosphorus or a combination (blend or reaction product) of the agent with other chemicals. In one embodiment the agent is a phosphate ester. In one embodiment the...

Company name: Henkel
Published On: Friday June 02nd, 2017

Composite components on the basis of hydrophobic polyols

The present invention relates to the use of hydrophopic polyols for producing fiber composite components on the basis of a polyurethane/polyisocyanurate reaction mixture, to a method for producing composite components and to the composite components as such. The method according to the invention is particularly economical in terms of saving...

Company name: Covestro
Published On: Friday June 02nd, 2017

Method for the continuous production of stable prepolymers

The invention relates to a method for the continuous production of stable prepolymers based on high-melting diisocyanates, in particular, 1,5-naphthalindiisocyanate, and to the use thereof for producing polyurethane elastomers, in particular casting elastomers.

Company name: Covestro
Published On: Saturday June 03rd, 2017

Inkjet ink, inkjet recording method and ink recorded matter

An inkjet ink, containing: water; a water-soluble organic solvent; a pigment; and polycarbonate urethane resin particles, wherein the water-soluble organic solvent contains 50% by mass or more of a diol compound, and wherein the water-soluble organic solvent contains 50% by mass or more of a water-soluble organic solvent having a boiling point of...

Company name: Ricoh
Published On: Friday June 02nd, 2017

Photocurable electroconductive ink composition

Disclosed is a photocurable electroconductive ink composition including: (A) an oligomer of urethane acrylates, (B) three types of acrylates composed of either tetrafunctional acrylates or trifunctional acrylates, difunctional acrylates and monofunctional acrylates, (C) an electroconductive filler, (D) two or more types of photopolymerization...

Company name: Tanaka Kikinzoku Kogyo
Published On: Friday June 02nd, 2017

Polyurethane resin composition for electrical insulation

The invention provides a polyurethane resin composition for electrical insulation that has excellent compatibility between an isocyanate component and a polyol component, and that exhibits excellent heat resistance, moisture resistance, and insulation properties. The polyurethane resin composition for electrical insulation comprises (1) Part A...

Company name: Asahi Kasei Chemicals
Published On: Friday June 02nd, 2017

Polyamideimide adhesives for printed circuit boards

The present invention relates to curable, liquid, adhesive compositions comprising polyamideimide resins for use in bonding layers of material in metal clad laminate materials for electronic components, such as flexible circuit boards. In particular, the invention relates to liquid adhesive compositions comprising polyamideimides having a terminal...

Company name: Sun Chemical
Published On: Friday June 02nd, 2017

Intermediate coating composition, multilayered coating film, and method for forming the multilayered...

An intermediate coating composition used in forming an intermediate coating layer directly overlaid on a surface of an electrodeposition coating layer constructing a vehicle outer panel, the coating composition containing as resin components: (a) 1% to 27% by mass of a polycaprolactonetriol; (b) 20% to 60% by mass of a blocked isocyanate; and (c)...

Company name: Nippon Paint
Published On: Friday June 02nd, 2017

Coating agent

A coating agent includes a polyurethane and a hydrocarbon-based synthetic wax.

Company name: NICHIAS
Published On: Friday June 02nd, 2017

Airfoil leading edge coatings

A polyurethane or polyurea coating composition for use in protecting a leading edge substrate on an airfoil, such as aircraft wings, rotor blades and propeller blades, against liquid or solid particle erosion, the composition made from a polyisocyanate and curing agents, such as polyaspartic esters, aldimines and ketimines, polyamines and polyols...

Company name: Hontek
Published On: Friday June 02nd, 2017

Two-component coating compositions and coatings produced therefrom for improving erosion resistance

The present invention relates to a two-component coating composition comprising (1) a paint base component comprising (A) at least one polycarbonate diol, (B) at least one diamine having secondary amino groups and having an aliphatic group (b1) between the nitrogen atoms of the amino groups, and also (2) a hardener component comprising (C) at least...

Company name: BASF Coatings AG
Published On: Saturday June 03rd, 2017

Adhesive composition for optical member, optical member comprising same, and optical display device...

The present invention relates to an adhesive composition for an optical member, an optical member comprising the same, and an optical display device comprising the same, wherein the composition comprises a (meth)acryl-based copolymer containing an acetoacetoxy group, a metal chelate curing agent, and a tri- or higher functional isocyanate-based...

Company name: Samsung SDI
Published On: Friday June 02nd, 2017

Adhesive film for polarizing plate, adhesive composition for polarizing plate for the same,...

An adhesive film for polarizing plates, an adhesive composition for polarizing plates, a polarizing plate including the same, and an optical display including the same are provided. An adhesive film for polarizing plates is formed of an adhesive composition including: a (meth)acrylic copolymer including a hydroxyl group and a carboxylic acid group;...

Company name: Samsung SDI
Published On: Friday June 02nd, 2017

Heat-resistant adhesive sheet for semiconductor inspection and semiconductor inspection method

A heat resistant adhesive sheet is provided that does not easily develop deformation of an adhesive sheet due to heating. Such an adhesive sheet made by laminating an adhesive layer to a substrate is provided, characterized in that the substrate is heat shrinkable and the adhesive layer contains a (meth)acrylate copolymer, a photopolymerizable...

Company name: Denka
Published On: Friday June 02nd, 2017

Active-energy-ray-curable pressure-sensitive adhesive composition, pressure-sensitive adhesive, and...

An active-energy-ray-curable pressure-sensitive adhesive composition comprising a urethane (meth)acrylate-based compound (A) obtained by reacting a polybutadiene-based polyol (a1), a polyvalent isocyanate-based compound (a2), and a hydroxyl group-containing (meth)acrylate-based compound (a3) and an ethylenically unsaturated monomer (B), wherein...

Company name: The Nippon Synthetic Chemical Industry
Published On: Friday June 02nd, 2017

Mounting foam compositions

A mounting foam contains polyols, isocyanates, plasticizers, surfactants, a catalyst and gases. The foam contains polyols from 30% to 35% and gases from 15.5% to 17.5%, where the ratio of NCO:OH is from 3.4 to 3.9. The foam is used as an adhesive for coatings and to fill voids in structures.

Company name: Selena
Published On: Saturday June 03rd, 2017

Cleaning blade

In a cleaning blade 1 having an elastic body 11, which is a molded article of a rubber material, the elastic body 11 having at least a surface-treated layer 12 formed at least on an abutting part with an object of contact, the surface-treated layer 12 is formed by impregnating the elastic body 11 with a surface treatment liquid which contains a...

Company name: Synztec Co., Ltd
Published On: Friday June 02nd, 2017

Multi-layered grip

Disclosed are grips and methods of making grips for use with the handle of an article, and in particular for use with fishing poles and golf clubs. Grips preferably include a multi-layered gripping member and an inner sleeve or mounting body. The gripping member can include an outer layer with a fabric layer coated and preferably saturated by...

Company name:
Published On: Friday June 02nd, 2017

Cosmetic composition prepared by impregnation in urethane foam

The present invention relates to a cosmetic composition in which a W/O (water in oil) cosmetic composition with low viscosity is packaged in an airless container, and more specifically, to a cosmetic composition with low viscosity which enhances the stability of easily-separable low viscosity materials and improves user convenience by impregnating...

Company name: Amorepacific
Published On: Friday June 02nd, 2017

Flexible, adherent, and non-polyurethane film wound drape cover

A system for treating a tissue site includes a reduced-pressure source to apply reduced pressure, a manifold in fluid communication with the pressure source to provide reduced pressure to the tissue site, and a drape for adhering to the tissue site to cover the tissue site and the manifold. The drape includes an adhesive layer for sealing the drape...

Company name: KCI Licensing
Published On: Friday June 02nd, 2017

Methods of producing polyurethane three-dimensional objects from materials having multiple...

A method of forming a three-dimensional object of polyurethane, polyurea, or copolymer thereof is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable...

Company name: Carbon
Published On: Saturday June 03rd, 2017

Methods for preparing optical articles and optical articles prepared therefrom

Provided is a method of preparing a transparent, non-elastomeric optical article including (1) combining to form a reaction mixture free of urethanation catalysts (a) a polyisocyanate component; and (b) an active hydrogen component of polyol and/or polythiol, and at least one compound containing both amine and hydroxyl functional groups; (2)...

Company name: PPG Industries
Published On: Saturday June 03rd, 2017

Polyurethane elastomeric seal for hydraulic pumps

A method for forming a piston seal of a hydraulic pump includes forming a reaction mixture that includes a prepolymer component, a polyol additive, a diol component, and a curative component, forming a sealing element with the reaction mixture and a mold, and curing the sealing element to form a piston seal of a hydraulic pump. The prepolymer...

Company name: Dow Global Technologies
Published On: Friday June 02nd, 2017

Method for producing a sole for a shoe

The invention relates to a method for producing a sole for a shoe, especially for a sports shoe, wherein the sole has at least a first section which consists of a first plastic material and has at least a second section which consists of a second plastic material, wherein the second plastic material is Expanded Thermoplastic Polyurethane. To obtain...

Company name:
Published On: Friday June 02nd, 2017

Polyurethanes, articles comprising the same and methods of manufacture thereof

Disclosed herein a composition comprising a urethane of the FIG. 3; where hydroxyl or amine linkages on the urethane of the FIG. 3 are functionalized with molecules that contain fluorine atoms, phosphorus atoms, sulfur atoms, unsaturated carboxylic acids, derivatives of unsaturated carboxylic acids, or combinations thereof. Disclosed herein too is...

Company name: University of Florida
Published On: Saturday June 03rd, 2017

Nitrogen-containing compounds suitable for use in the production of polyurethanes

The present invention relates to the use of nitrogenous compounds of formula (I) and/or corresponding quaternized and/or protonated compounds for production of polyurethanes, to compositions comprising said compounds and also to polyurethane systems, in particular polyurethane foams, obtained using said compounds.

Company name: Evonik Degussa GmbH
Published On: Saturday June 03rd, 2017

Degradable extrusion resistant compositions and articles of manufacture

A degradable polymer composition comprises a polyurethane comprising ester groups in a backbone of the polyurethane and carboxylic acid groups attached to the backbone of the polyurethane; and a filler comprising one or more of the following: a powder comprising particles having an average particle size of about 5 microns to about 500 microns; or a...

Company name: Baker Hughes
Published On: Friday June 02nd, 2017

Polyurethane polymers and compositions made using discrete carbon nanotubes

In various embodiments a urethane/MOLECULAR REBAR formulation comprising a specific composition is disclosed. The composition comprises a urethane polymer or prepolymer/discrete carbon nanotube formulation. Utility of the urethane/MOLECULAR REBAR composition includes improved foams and adhesives.

Company name: Molecular Rebar Design
Published On: Friday June 02nd, 2017

Acrylamide-based crosslinking monomers, their preparation, and uses thereof

A process for preparing an acrylamide-based crosslinking monomer including reacting in the presence of a catalyst an isocyanate compound containing at least two isocyanate groups with one of acrylic acid and methacrylic acid.

Company name: Saltworks Technologies
Published On: Friday June 02nd, 2017

Development of poly(urethane-ester)amide from corn oil and their anticorrosive studies

Corn oil-based poly(urethane-ester)amide was synthesized from corn oil-based fatty amide diol, camphoric acid, and tolylene 2,4-diisocyanate. The structure of corn polyesteramide and corn poly(urethane-ester)amide (CPEA) was confirmed by Fourier transform infrared, 1H NMR, and 13C NMR spectroscopic techniques. CPUEA coatings were made on mild steel...

Company name: King Saud University
Published On: Saturday June 03rd, 2017

Sugarcane Straw Reinforced Castor Oil Polyurethane Composites: Fiber Characterization and Analysis...

This work was concerned with the development of polyurethane (PU) composites reinforced with cellulose fibers attained from sugarcane straw. For the obtainment of cellulose, sugarcane straw was pretreated and delignified. For the production of the PU, the polyol (castor oil) to diisocyanate mass ratio was 1.5:1.0. Reinforcement of the matrix was...

Company name: University of Sao Paulo
Published On: Saturday June 03rd, 2017

Characterization of urethane-dimethacrylate derivatives as alternative monomers for the restorative...

The aim was accomplished by a comparative analysis of the physicochemical properties of urethane-dimethacrylate (UDMA) monomers and their homopolymers with regard to the properties of basic dimethacrylates used presently in dentistry. The homologous series of UDMA were obtained from four oligoethylene glycols monomethacrylates (HEMA, DEGMMA, TEGMMA...

Company name: Silesian University of Technology
Published On: Saturday June 03rd, 2017

Synthesis of hydrophobic fluorinated polyurethanes and their properties of resistance to cavitation...

Hydrophobic fluorinated polyurethanes (FPU) without hydrophilic single bondCH2OH groups were prepared by introducing fluorine with the method of perfluoroalkyl ethanols (TEOH-10) for modification of diphenyl-methane-diisocyanates (MDI) and regulating the dosage and time of the MDI added. The experiment of water resistance indicates that the...

Company name: North China University of Water Resources and Electric Power
Published On: Saturday June 03rd, 2017


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