定期校准 meaning in Chinese

periodic calibration

The lighting and light matching capability of the automobile headlamp is very important to the safety of night - driving . the measurement of automobile headlamp must use the headlamp measure instrument , which is needed to use a calibration instrument to calibrate . however , whether the calibration instrument is standard must be checked up by a measure system
汽车前照灯的检测需要用“汽车前照灯检测仪” ，而“汽车前照灯检测仪”的定期校准工作需要用“前照灯检测仪校准器”来进行； “前照灯检测仪校准器”是否合乎标准需要靠“前照灯检测仪校准器检定系统”来检测。