使用位测试，可以容易地测试标志变量上的特定标志。

Using bit tests, you can easily test for specific flags on a flag variable.

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本文介绍了一种适合于易燃易爆液体贮罐的光纤液位测试系统。

This paper describes a fibre optic liquid level measuring system. It is applicable to the storage tank that is easy to burn and explode.

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本文针对目前普遍采用的接触网检测车杆位测试系统存在的问题，提出了一种基于GPS的改进方案。

Owing to the problem exists in the supporting pole number testing system of the Catenary Inspection Car, an improved method based on GPS is proposed.

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