Every synthetic resin has its advantages and disadvantage,some resin's disadvantage is just the advantage for polysilicone.
各种有
合成树脂有各自
优
和
,它们正
是有
聚合物优。
聚合物Every synthetic resin has its advantages and disadvantage,some resin's disadvantage is just the advantage for polysilicone.
各种有合成树脂有各自优和,它们正是有聚合物优。
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