第二代优化设计产品，不需操作者调节，专用于保温钉焊接。

Optimally designed, the second generation products. No need operator's.

youdao

第二代优化设计产品，不需操作者调节，专用于保温钉焊接。

Optimally designed, the second generation products. No need operator's.

youdao