Cage is an important device in the mine production, designed scientifically and rationally.

罐笼是矿山生产中的一个重要设备，需要科学、合理的设计。

youdao

Cage is an important device in the mine production, designed scientifically and rationally.

罐笼是矿山生产中的一个重要设备，需要科学、合理的设计。

youdao