短语词组短语exhaust air box 排风室rotary exhaust box 旋转式排气箱exhaust valve rocker box 排气门摇臂室deck exhaust box 双层排气箱chain exhaust box 链式排气箱circular exhaust box 转盘式排气箱double -deck exhaust box 双层排气箱box exhaust volute 箱式蜗壳 返回 exhaust box