为了提高油料计量的精度，对在线流量计必须进行周期检定。
To improve the fuel metering accuracy, flowmeter must be calibrated periodically.
编制计量器具周期检定计划，申报、筹建自检项目，外送强制检定器具。
Work out plans for periodic calibrating instrument. Arrange to send instrument calibrated by official department.
对雷达检测设备进行周期检定是雷达装备计量保障工作的重要内容之一。
Periodical check-up of the radar test equipment is one of the important tasks of the radar equipment measurement support.
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