Every synthetic resin has its advantages and disadvantage,some resin's disadvantage is just the advantage for polysilicone.
各种有机合
有各自的优
缺,它们的缺
是有机硅聚合物的优。
，人造Every synthetic resin has its advantages and disadvantage,some resin's disadvantage is just the advantage for polysilicone.
各种有机合有各自的优缺,它们的缺是有机硅聚合物的优。
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