The manufacturing of the compound contact wire used for high-speed railway of trains is developing in China.

高速铁路复合接触线的制造在我国尚属起步阶段。

youdao

The manufacturing of the compound contact wire used for high-speed railway of trains is developing in China.

高速铁路复合接触线的制造在我国尚属起步阶段。

youdao