National Metrological Verification Regulations of the People's Republic of China
Scope
This procedure applies to the initial calibration, subsequent calibration and in-use inspection of the railway track inspection instrument calibration bench (hereinafter referred to as the "calibration bench").
JJG(铁道) 192-2006 Referenced Document
JJF 1059-1999 Evaluation and Expression of Uncertainty in Measurement
JJG 34-1996 Verification Regulation of Dial Gauges(reading in 0.01mm and 0.001mm)