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- The system should be flushed before the backflow valve is installed. 在安装防回流阀之前，系统应该进行冲洗。
- After removing the first check from the backflow valve body, place on a flat surface with the coil spring facing up. 从防回流阀阀体上拆卸第一止回阀后，要使螺旋弹簧面朝上放在平面上。
- Headstock piece on media flows and forces open or closed to prevent backflow valve media called a non-return valve. 启闭件靠介质流动和力量自行开启或关闭，以防止介质倒流的阀门叫止回阀。
- The Regulating Backflow Valve of Reciprocal Compressor 活塞式压缩机可调回流气阀
- Have you turned off the water valve? 你关掉水阀了吗？
- A check valve may be required ahead of the backflow preventer. 此时在防回流阀前面可能需要安装一个止回阀。
- We need an eye bolt to fit this valve. 我们需要一个有眼螺栓来固定这个阀门。
- He soon detected the faulty valve. 他很快查到了出毛病的阀门。
- Four required per backflow preventer. 每个防回流阀需要四个。
- Winterization of backflow preventers. 防回流阀的过冬处理。
- backflow valve 逆止阀
- The pump sucks air out (of the vessel) through this valve. 这台泵通过这个阀门把(容器中的)空气抽出。
- The relief valve may be serviced while on or off the backflow preventer valve. 可以在防回流阀上维修安全阀，或将其从防回流阀拆卸下来维修。
- The exhaust valve on my car have burn out three times. 我车子上的排气阀已烧坏三次。
- The exhaust valve on my car has burnt out three times. 我车子上的排气阀已烧坏三次。
- For use with backflow preventer test cocks to protect from damage. 用于防回流阀测试旋塞，防止受到破坏。
- Composed of a single valve or piece. Used of a shell. 单瓣的由单个瓣膜或部分组成的。用于壳
- This would create an air gap to eliminate any possible backflow. 这将产生一个气隙以消除任何可能的回流。
- This valve regulates the flow of water. 这个阀门控制着水的流量.
- The backflow preventer must be installed upstream of the regulator. 防倒流装置必须安装在调节阀的上游位置。
