An alloy of copper and tin, sometimes containing small ...
Rolling, heating, and quenching steel sheets often affect ...
Wang Wenyin chairs Amer International Group, a supplier of ...
A workpiece is any manufacturing artifact at any stage of ...
Aluminium (or aluminum; see different endings) is a ...
A red-brown metal, the chemical element of atomic number ...
Student
北京, 中国
0
用語
1
グロッサリ
3
フォロワー
57
2
95
10
107
6
51
47