The traditional method to adjust the valve opening and to turn on or turn off the pump engine by people to meet the need of water supply was improved.

提出了变频自动控制在节水灌溉中的应用方案，改变了传统的调整阀门开度及人工启停电机来满足供水需要的操作方法。

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The gate valve usually is at the off-position, the water pump starts when the gate valve opens slowly, when water pump engine off, the gate valve shuts down slowly first.

闸阀平时是处于关闭状态，水泵启动时闸阀慢慢打开，水泵停机时，闸阀先慢慢关闭。

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He thereby transformed an inefficient pump of limited use into a steam engine of a thousand uses.

因此，他将应用范围有限且效率低的蒸汽泵改造成了应用范围广泛的蒸汽发动机。

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There was an added intention of restoring the Scottish-made beam engine pump machinery to full working order.

UNESCO: Historical Waterworks Building wins Heritage Award

Controlling steering using electric motors also helps to reduce fuel consumption and hence carbon-dioxide emissions. (Electric motors require power only when the steering wheel is turned, whereas a hydraulic pump drains power from the engine all the time.) Ford reckons 90% of its cars will have electronic steering within three years.

ECONOMIST: Rational consumer

During periods of high demand, the heat pump runs in reverse as a heat engine, expanding and cooling the argon and generating electricity.

ECONOMIST: Energy storage