Surface treatment: black, zinc, phosphate, mechanical zinc, copper and other varieties.

产品表面处理：发黑、镀锌、磷化、机械镀锌、镀铜等品种。

youdao

Surface treatment: black, zinc, phosphate, mechanical zinc, copper and other varieties.

产品表面处理：发黑、镀锌、磷化、机械镀锌、镀铜等品种。

youdao