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  1. Oxford American Dictionary

    drop hammer

    • IPA[ˈdräp ˌhamər]
    • n.
      a large heavy weight raised mechanically and allowed to drop, as used in drop-forging and pile-driving.

    • noun: drop hammer, plural noun: drop hammers

    • 更多解釋

    drop hammer

    • n.
      a large, heavy weight raised mechanically and allowed to drop, as used in drop-forging and ...

    Oxford Dictionary