The volume is fixed by measuring a specific gas (liquid) of controlled temperature and pressure using a sample measurement tube.

通过使用样品测量管测量受控温度和压力的特定气体(液体)来固定体积。

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Applications such as measuring light with a photomultiplier tube generally require the use of a picoammeter due to the low current levels involved.

由于要测量的电流非常弱，所以用光电倍增管测量光的应用工作通常需要使用皮安计。

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Measuring diameter of fore and aft stern tube bearing and bushes.

艉轴管前、后轴承与衬套直径测量。

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