齒輪減速器reduction: n. 1.縮小,減少;降級,降位;(刑罰等的)輕減;減速 ...gear: n. 1.【機械工程】齒輪,(齒輪)傳動裝置,齒鏈;排擋 ...eed reduction gear box: 齒輪減速箱eed reduction: 減速eed gear: 變速齒輪下載手機詞典可隨時隨地查詞查翻譯