基本解釋[機] 擺動換曏齒輪詞組短語短語tumbler r gear 擺動換曏齒輪gear tumbler 齒輪換曏器tumbler gear更多詞組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劍橋字典tumbler gear柯林斯字典專業(yè)釋義機械工程擺動換曏齒輪