整句的意思!不过主要是这里的shut off 的意思!? only if a direct process relationship between the pressure in the suction vessel,suction liquid column and delivery head can be excluded ,the maximum of all three simultaneously need not be considered.shut off head equals 125% of head of normal flow. 试着翻译: 当泵的吸入罐(进口液体容器)内的压力、吸入液体高度和输送压头的直接关系不被考虑的时候,此三者的最大值不必同时考虑。泵的出口阀关闭之后的压头等于正常流量时压头的125%。查看更多