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Thermoset Plastic Correct Answers A polymer that can only be moulded once, if heated again it will burn rather than melt. Thermo Plastic Correct Answers A polymer that can be moulded more than once. Welding Correct Answers The process in which separate metal parts are joined using heat and an extra material. Soldering Correct Answers The process in which electrical components are joined together using an iron. Injection Moulding Correct Answers When molten plastic is pushed into...