而对于环氧树脂胶合试件来说，丙酮表面处理处理前后压缩剪切强度的差异不大。
As for the epoxy adhesive, there was little difference before and after acetone surface treatment.
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它们是用一种普通的塑胶合成树脂做成的。
They are made of a common plastic resin.
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