下游端 meaning in Chinese

downstream end

In balancing valve upstream and downstream ends of the tube with a hole , used to measure the fluid through valves pressure reduction
在平衡阀的上游、下游端各装一个测压孔，用来测量流体通过阀门的压降。
Insert a soft , blunt instrument into the downstream end of the valve and push the ball and seal carrier out of the upstream end of the valve
将柔软的、钝的工具插入阀门的下游端口，将球体和密封托架从阀门的上游端口推出。