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它表明制作某一种塑料采用了哪一种树脂。
It indicates which type of resin is used to make a plastic.
youdao
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酚醛树脂和塑料工业：昨天，今天，明天。
Phenolic resins and the plastics industry: yesterday, today, and tomorrow.
youdao
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它们是用一种普通的塑料合成树脂做成的。
They are made of a common plastic resin .
youdao
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它们是用一种普通的塑料合成树脂做成的。
They are made of a common plastic resin.
youdao
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它们是用一种普通的塑料合成树脂做成的。
They are made of a common plastic resin.
youdao