PNEUMATIC DOOR PUMP OPEN INSIDE Speed control in final process of both opening and closing of the door, to avoid slamming to the bus body.是什么意思_PNEUMATIC DOOR PUMP OPEN INSIDE Speed control in final process of both opening and closing of the door, to avoid slamming to the bus body.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句