AIR VALVE IS MADE UP OF UPPER VALVE SEAT, LOWER VALVE SEAT, 5 KINDS OF ACCURATE VALVE SLICE AND 25 SPRINGS.是什么意思_AIR VALVE IS MADE UP OF UPPER VALVE SEAT, LOWER VALVE SEAT, 5 KINDS OF ACCURATE VALVE SLICE AND 25 SPRINGS.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句