upstream pressure meaning in Chinese
阀前压力
进口压力
上游压力
Examples
- Relief vent will discharge water when , during no - flow periods , ( 1 ) the first check valve is fouled or ( 2 ) the inlet pressure to the device drops sufficiently due to upstream pressure fluctuations
如果在无流动期间，安全阀排气口有水排出，则原因可能是， ( 1 )第一止回阀受到污染，或( 2 )由于上游压力波动造成装置的进口压力下降太大。