- 逆流: anarrhea; backset; backwash; ...
- 阀: established house or power g ...
- 顺流和逆流阀门: upstream and down stream valves
- 逆流: anarrhea; backset; backwash; contra-flow; counter-flow; eddy; receding; counter current; reverse flow; opposite flow; upstream
- 反流(逆流)反流(逆流): countercurrent
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