This standard specifies the reference units, symbols and accuracy used when measuring the machine dimensions, performance and parameters of earth-moving machinery defined in GB/T 8498. This standard does not include specific measurement methods and instruments used.
GB/T 21153-2007 Referenced Document
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values*, 2008-07-16 Update
GB/T 8498 Earth-moving machinery—Basic types—Identification and terms and definitions*, 2017-11-01 Update
GB/T 21153-2007 history
2007GB/T 21153-2007 Earth-moving machinery.Units for dimensions,perfprmance and capacities, and their measurment accuracies