pump head造句

• The great point in favour of this construction is that the medium only comes in contact with the inside of the hose and with the delivery valves and not , as with typical diaphragm piston pumps , with the pump cover or the pump head respectively
  这种泵的结构上的另一个显著的特点是介质仅与软管隔膜的内侧和阀门相接触，而不是象典型的隔膜活塞泵那样，介质同泵腔和泵盖也都分别会有接触。
• By citing distribution piping loss curve , analyses the two commonly used control methods of constant pump head and constant remote circuit differential pressure and considers that control with a constant remote circuit differential pressure is the better
  通过提出输配管压损曲线概念，从理论上分析了计量供热变流量系统循环水泵常用的恒扬程控制和恒定最不利环路压降控制两种方案，认为恒定最不利用户资用压力方案节能效果较好。