短語詞組短語back gear shaft 背齒輪軸back axle shaft 后傳動(dòng)軸back drive shaft bushing 后主動(dòng)軸襯套back shaft scroll 后軸渦輪back -up shaft 支持輥輥軸JMWNY Back shaft 后軸back shaft station 折返式井底車場(chǎng)back shaft bracket 后尾軸架 返回 back shaft