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- propellant backflow 支撑剂回流
- Four required per backflow preventer. 每个防回流阀需要四个。
- To propel a boat or raft with a pole. 以竿撑船用一根杆或篙推动小船或筏子
- Winterization of backflow preventers. 防回流阀的过冬处理。
- To strike, propel, arouse, or stimulate. 促进，推动，唤起，刺激
- To propel(a projectile);launch(a missile). 发射推动（抛射物）；发射（导弹）
- To propel with or as if with oars or an oar. 划:用桨推动。
- To propel by striking with the foot. 通过踢来推动
- Vehicle of Flight Propel yourself higher! 尽量进入大转盘的内部,碰运气可以上到上一层。
- 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。
- To strike,propel,arouse,or stimulate. 促进，推动，唤起，刺激
- 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。
- To propel(a ball)by means of a punt. 踢用踢的方式来驱策（球）
- To propel(a watercraft)with paddles or a paddle. 用浆划动用船桨推动（船只）
- To propel(a ball) by means of a punt. 踢用踢的方式来驱策（球）
- To propel(a projectile); launch(a missile). 发射推动（抛射物）；发射（导弹）
- 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。
- To propel(a watercraft) with paddles or a paddle. 用浆划动用船桨推动（船只）
- 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。
- To propel a watercraft with paddles or a paddle. 以浆划动用桨推动船只
