回流;逆流

reversed flow的用法和样例：

例句

This backwash current is governed by volume of water and flow.回流的水流是由水量及流动决定的。
The Pacific tilting disc check valve uses gravity to rapidly close the disc upon reversal of flow.美国太平洋翻转式阀瓣止回阀在出现逆流时利用重力迅速关闭阀瓣。

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