A: markinf line is a kind of melting through heating can be made of the polymer wirelike side.This materials.
答:熔线是一种可熔融的聚合物制成的线状结材料。
A: markinf line is a kind of melting through heating can be made of the polymer wirelike side.This materials.
答:熔线是一种可熔融的聚合物制成的线状结材料。
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