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. 头一次在外语专区发帖,请赐教!整句是关于压力设计的!这里的三是指maximum suction head of liquid \pumo shut off head \maximum pressure in the suction vessel.查看更多8个回答 . 4人已关注