基本解释[機] 擺動換曏齒輪词组短语短語tumbler r gear 擺動換曏齒輪gear tumbler 齒輪換曏器tumbler gear更多词组英英字典柯林斯英英字典 a train of gears in which the gear-selection mechanism is operated by tumblers tumbler gear剑桥字典tumbler gear柯林斯字典专业释义機械工程擺動換曏齒輪