顶头是斜轧穿孔主要的变形工具之一，其作用是将实心管坯穿轧成一定壁厚的空心毛管。

Plug is one of the key deformation tools in cross piercing. Its function is turning a solid bar into a hollow bloom.

youdao

顶头是斜轧穿孔主要的变形工具之一，其作用是将实心管坯穿轧成一定壁厚的空心毛管。

Plug is one of the key deformation tools in cross piercing. Its function is turning a solid bar into a hollow bloom.

youdao