2010JJF 1254-2010 Calibration Specification for Height Measuring Instrument with Digital Display
1998JJG 929-1998 Verification Regulation of Digital Display Height Measuring Instrument
JJG 929-1998 Verification Regulation of Digital Display Height Measuring Instrument was changed to JJF 1254-2010 Calibration Specification for Height Measuring Instrument with Digital Display.