A comparison was made between the bottom gating system, middle level gating system, and step gating system.

对底注、中注及阶梯注三种浇注系统进行对比。

youdao

A comparison was made between the bottom gating system, middle level gating system, and step gating system.

对底注、中注及阶梯注三种浇注系统进行对比。

youdao