Model the spherical valve case with characteristic parameter which is the caliber of the valve, and according to some standards determine other structure sizes and create the data file.

以阀门的口径为特征参数，根据标准确定阀体的其他结构尺寸，并建立数据文件。

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If the electron flow takes place in a vacuum, as in the case of electronic valve, the electrons will travel at considerable speed, since little resistance is offered the medium.

如果电子在真空里流动，比如电子真空管，那么电子的运行速度非常快，因为介质对电子几乎不产生什么阻力。

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As described earlier, the electrical current to the solenoid of a proportional valve needs to be regulated and not just simply switched on or off as is the case with a conventional valve.

作为简单描述，提供给比例阀电磁铁的电流需要被调节，不象应用常规阀的时仅有开关通或断那样简单。

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In either case, each spin valve reacts to only one sort of molecule, so the chips can search simultaneously for as many types of molecules as they have spin valves.

ECONOMIST: Labs on a chip