net positive suction head是什么意思

用法例句

Based on the working experience, with respect to general feature of pumps used in chemical factories, a set of methods to calculate the parameters, such as flow volume, head, net positive suction head and shutoff pressure, of pumps was summed up.

在整理以往工作经验的基础上,针对化工厂用泵的一般特点,总结出了一套计算泵的流量、扬程、净正吸入压头和憋压等设计参数的方法。