In addition a reversed flow was formed in the outlet, which could cause a block and produce noise.

另外，在出料直管内形成一个回流区，易造成出料口堵塞，也会产生噪声。

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Reversed flow is stopped or held in "check" by fluid backflow pressure which seats the closure device against the valve body.

倒流的流体通过倒流的流体压力将止回关闭装置与阀体紧密密封，从而实现阻止倒流的“止回”功能。

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In many kilns the air flow can be reversed in order to reduce these differences.

许多干燥窑内的空气是可以反向流动的，为的是减少这种差异。

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In May, Enbridge, a Canadian company, reversed the flow of a big North American oil pipeline, sending a glut of oil from America's northern plains southward to coastal refineries.

ECONOMIST: Petrol prices

Most financial deals these days between the Middle East and the United States involve the purchase of American assets, but on Wednesday, Dubai reversed the flow by cashing out of a New York skyscraper.

FORBES: Magazine Article

Since October, that concern has become acute as the inward flow has reversed, with hot money now leaving China.

FORBES: China Says Yuan Will Be Fully Convertible Soon