短語(yǔ)詞組短語(yǔ)gear -shifting laws 換檔規(guī)律power gear -shifting 動(dòng)力性換檔gear speed shifting mechanism 齒輪變速機(jī)構(gòu)gear speed shifting 齒輪變速on -load gear-shifting switch 帶載換檔開關(guān) 返回 gear shifting