表面处理前需要酸洗的产品，一定要钻流水孔！

A water discharge hole shall be a must for products requiring pickling treatment prior to surface processing.

youdao

表面处理前需要酸洗的产品，一定要钻流水孔！

A water discharge hole shall be a must for products requiring pickling treatment prior to surface processing.

youdao