短语词组短语Automatic reflux control valve 自动回流控制阀reflux x valve 逆流阀reflux valve return valve 回流阀Aetv Reflux valve 和背压阀;逆流阀recoil type reflux valve 回弹式逆流阀reflux valve west bank 防逆阀valve reflux 瓣膜返流 返回 reflux valve