pressure head
压力高差
压力水头
压力头
压力落差
压力润滑
水压头
静液压力
静水压力
压位差
压<力高>差
压〔力高〕差
压[强水]头
压头
押头
扬程
强制润滑
stress net pressure fracture
pressure head deviation rate
hydraulic pressure head
pipe net pressure maitamce
negative water pressure head
different air-gap and pressure head
effective pressure head
baffling pressure head box
dynamic pressure head correction