圆弧导向管采用滚轮导向结构，减少铜杆表面擦伤。

The arc guiding pipe is in a trolley-guiding construction to reduce the scratch upon the wire rods surface.

youdao

圆弧导向管采用滚轮导向结构，减少铜杆表面擦伤。

The arc guiding pipe is in a trolley-guiding construction to reduce the scratch upon the wire rods surface.

youdao