In places such as India, ingenious, if slightly dangerous, devices exist whereby a fan is used to blow air through a mesh of straw which has water trickling through it powered by a small pump.

在印度之类的地方，那里有一种巧妙但或许稍有危险的设备，它利用风扇将空气吹过一个利用小型水泵而流淌着水的秸秆网来降温。

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A small pump with an extended suction duct that is designed to pump fluid from barrels.

一种带延伸的吸入导管的小泵，用来从桶中泵出流体。

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The design principle is to decrease the pump velocity, reduce stroke or to use a small pump to reduce the pump displacement and keep proper submersible depth.

设计原理是减慢泵速、缩短冲程或改用小泵来降低排量，保持适当的沉没深度。

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And in sub-Saharan Africa, where only four percent of the land is irrigated, buying a small pump can make a big difference.

VOA: standard.2010.08.09

For a small farmer, replacing a bucket with a pump can lead to cultivating a wider variety of crops and creating work for family and neighbors.

VOA: standard.2010.08.09

It has a bivalve shell, two strings which move the valves against one another, and a small pump that expels water (he is still working on the best design for the foot).

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To maintain the critical temperature, Dr Zheludev uses a small electronic heat pump known as a Peltier cell.

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Static electricity could cause a small spark when a petrol pump nozzle is inserted which could in turn ignite fuel vapour in a flash fire.

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