• A new type phosphating solution of zinc series at low temperature was prepared.

    研制了一种新型低温磷化液。

    youdao

  • A zinc-series phosphating process at room temperature was developed.

    研制常温锌系磷化工艺

    youdao

  • A zinc-series phosphating process at room temperature was developed.

    研制常温锌系磷化工艺

    youdao

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