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See Chinese contents: GB 20891-2014 GB 20891-2014: Limits and measurement methods for exhaust pollutants from diesel engines of non-road mobile machinery (CHINA III, IV)
The standard specifies the limits and measurement methods for the exhaust pollutant from diesel engines of non-road mobile machinery (including marine diesel engines with a rated net power not exceeding 37kW) and the secondary diesel engines installed on road vehicles for carrying people (cargo).
