短語詞組短語gear rack transmission 齒輪齒條傳動gear wheel transmission 齒輪傳動gear planetary transmission 行星傳動gear train transmission 輪列傳輸sliding gear countershaft transmission 帶滑動齒輪中間軸變速器gear shifting transmission system 倒檔齒輪傳動系統(tǒng)internal gear planetary transmission 內齒行星齒輪differential gear harmonic transmission 差齒諧波傳動inner gear planetary transmission 內齒行星輪傳動 返回 gear transmission