短語詞組短語reversal spool valve 換曏滑閥reversal l valve 換曏閥Rotary Reversal Valve 鏇轉(zhuǎn)式換曏閥pneumatic reversal valve 氣控?fù)Q曏閥electromagnetic reversal valve 電磁換曏閥change valve reversal valve 換曏閥producer gas reversal valve 煤氣交換器air reversal valve 繙譯;空氣換曏閥reversal valve of large capacity 大流量換曏閥 返回 reversal valve