Researching and manufacturing the bogie of rapid speed wagon the key technologies for the rapid speed wagon.

解决货运提速的关键技术之一是研制快速货车转向架。

youdao

Researching and manufacturing the bogie of rapid speed wagon the key technologies for the rapid speed wagon.

解决货运提速的关键技术之一是研制快速货车转向架。

youdao