The English Chemist Joseph Priestley gave it the name rubber in 1770 when he uncovered it could be accustomed to rub out pencil marks. Its key industrial achievement came only once the vulcanization procedure was invented by Charles Goodyear in 1839. Ethylene Propylene Rubber (EPM) is a copolymer consisting of Successfully Submitted (Awaiting Approval)
หัวเจียรหุ้มยาง Fundamentals Explained
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