The color film phosphating process was improved, and the cost of phosphating agent was reduced by 50%.

改进了彩膜磷化工艺，将磷化剂的成本降低了50%。

youdao

The color film phosphating process was improved, and the cost of phosphating agent was reduced by 50%.

改进了彩膜磷化工艺，将磷化剂的成本降低了50%。

youdao