National Metrological Verification Regulations of the People's Republic of China
Latest
JJG 1129-2016
Scope
This procedure applies to the initial calibration, subsequent calibration and in-use inspection of railway wheel set contact resistance detectors (hereinafter referred to as detectors).
JJG 1129-2016 history
2016JJG 1129-2016 Instrument for Measuring Touching Resistance of Railway Wheelsets