Polyester resin base thoere is a type of plastic casting. Caused by the condensation polymerization is a polymer of Java, they compound the far neck (Glycol) and the คอะ SIM CID Benedict (Dibasic asid) is generally divided into two types, namely.1. the types of saturated (Saturated polyesterresin)2. non-saturation (Unsaturated polyester resin)Which is not saturated resin type the Hanja in the present?
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