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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%。
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BL-303 is dipping zinc phosphating treatment agent.
BL- 303系槽浸型锌系磷化处理剂。
youdao
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BL-303 is dipping zinc phosphating treatment agent.
BL- 303系槽浸型锌系磷化处理剂。
youdao