Material mark, sub surface.

内表面刻材料标记。

youdao

Synthesize the high mark sub - material, match an etc. such as the plastics, coating, gum.

合成高分子材料，如塑料、涂料、胶合剂等。

youdao

Synthesize the high mark sub - material, match an etc. such as the plastics, coating, gum.

合成高分子材料，如塑料、涂料、胶合剂等。

youdao