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
,它们正
是有机硅聚合
。
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,它们正是有机硅聚合。
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