drop

drop - 落下(下水)

drop bolt - 活節螺栓

drop bottom - 開底門；開口底

drop flue boiler - 回降煙道式鍋爐

drop forging - 落鎚鍛造

drop hammer - 落鎚

drop keel - 滑動龍骨

drop stamp - 落衝

drop strake - 落板列；竊板

drop test - 墜落試驗

drop valve - 墜閥

drop weight test - 落重試驗

drop-forged chain - 落鍛鏈

drop-shaped bulbous bow - 水滴型球艏

drop-testing machine - 墜落試驗機；落鎚[衝擊]試驗機

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