Swing-type check off er the least pressure drop and offer simple automatic closure; when fluid flow stops gravity and flow reversal closes valve.

旋启式止回阀压降最小，能够完全自动关闭，即在介质流动停止、重力和介质倒流的状态下自动关闭阀门。

youdao

If you do a biopsy you can see a reversal of these pathophysiological changes and blood pressure comes down.

如果你进行活检，你会看到这些病理生理改变的逆转，且血压降低。

youdao

Due to the influence of the elastic deformation of flexible structures, the efficiency drops constantly with the increase of the dynamic pressure, which even causes aileron reversal.

受到结构弹性变形的影响，随着飞行动压的增加，舵面的操纵效率不断下降，副翼甚至会出现操纵反效现象；

youdao

If there had been good follow-through selling pressure Thursday, then a bearish double-top reversal pattern would have been confirmed on the daily bar chart.

FORBES: P.M. Kitco Metals Roundup: Comex Gold Ends Solidly Higher as Traders Quickly Step in to "Buy the Dip"

The Bush administration on Tuesday decided to allow Rice to testify publicly to the independent commission under oath, a reversal that came after weeks of public pressure to do so.

CNN: Rice may testify before 9/11 panel by next week

More follow-through selling pressure on Thursday worked to help confirm the significance of the bearish key reversal down on the daily bar chart.

FORBES: Comex Gold Sharply Lower Again; Chart Damage Inflicted to Begin to Suggest Near-Term Market Top