A new type phosphating solution of zinc series at low temperature was prepared.
研制了一种新型低温锌系磷化液。
The solution after improvement is called zinc and calcium series phosphating solution.
改进后的磷化液称为锌钙系磷化液。
A zinc-series phosphating process at room temperature was developed.
研制了一种常温锌系磷化工艺。
A zinc-series phosphating process at room temperature was developed.
研制了一种常温锌系磷化工艺。
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