尺寸检查：指各种检查产品的方法，采用标准零件进行比对测量，采用量表检查待检产品是否符合图纸的规格要求。
DIMENSIONAL INSPECTION: Method used to check product made by machines and then gauges using masters and dial indicators to check them in comparison to blueprint specifications.
零线带电现象是指测量点处，零线与大地之间存在较明显的电位差。
The electrification of zero line results from the the potential difference between zero line and the earth.
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