The proposed system consists of an electroosmotic pump and two solenoid valves, all of which are controlled by a PC computer automatically.

该系统由一台电渗泵和两个电磁三通阀组成，均由计算机控制，实现了准确、重现和自动的分析要求。

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Then the controller opens the solenoid valve and starts the pump pressure, the water will be closed after the two will be closed.

这时控制器打开电磁阀并启动水泵加压，待水上满后两者将会同时关闭。

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The fixing seat is provided with a general water rout and at least two branch water routs, and each branch water rout is connected with the general water rout through a solenoid valve.

固定座设有一个总水路及至少二个分水路，每一个分水路都通过一个电磁阀接通总水路。

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The other two methods rely on specially shaped laser beams - instead of a beam whose intensity peaks at its centre and tails off gradually, the team is investigating two alternatives: solenoid beams and Bessel beams.

BBC: Nasa examines 'tractor beams' for sample gathering