check valvena.【机】止回阀单向阀;逆止阀;止逆阀例句1.a double check valve assembly shall be installed at each noted location.双止回阀总成应该安装在每个指定的位置。2.and a pilot operated check valve is linked with a valve block on the oil cylinder.液控单向阀与油缸上的阀块相联接。3.dual check valve backflow preventer for low hazard cross- connections . continuous pressure applications .双止回防回流阀用于低危险交叉连接。持续压力应用场合。4.dual way check valve for the "outstanding new products in shanxi province. "双路止回阀为“山西省优秀新产品”。5.the debris is prevented from flowing back out of the bailer by a check valve.利用一个止回阀防止碎片从捞砂筒中流出。