Every synthetic resin has its advantages and disadvantage,some resin's disadvantage is just the advantage for polysilicone.
各种有机合成树脂有各自的
,它们的正好是有机硅聚合物的。
Every synthetic resin has its advantages and disadvantage,some resin's disadvantage is just the advantage for polysilicone.
各种有机合成树脂有各自的,它们的正好是有机硅聚合物的。
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