短語(yǔ)詞組短語(yǔ)reversal spool valve 換向滑閥reversal l valve 換向閥Rotary Reversal Valve 旋轉(zhuǎn)式換向閥pneumatic reversal valve 氣控?fù)Q向閥electromagnetic reversal valve 電磁換向閥change valve reversal valve 換向閥producer gas reversal valve 煤氣交換器air reversal valve 翻譯;空氣換向閥reversal valve of large capacity 大流量換向閥 返回 reversal valve