在设置通断性测试时，工程师必须规定电阻最大为多少时可认为装置是可用的。
When setting up a continuity test, the engineer must specify the maximum resistance at which the device is considered to be valid.
使用三通阀时，可省掉一个两通阀和一个三通接管。
Use three-way valve, a two-valve and can be saved over a three links.
这样的低值磁通测量系统配上一个探测线圈时可探测很微弱的磁场。
Such a low magnetic flux measurement system may also be used for measuring low magnetic field with an adequate measuring coil.
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