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See Chinese contents: HJ 857-2017 HJ 857-2017: Measurement method and technical specification for PEMS test of exhaust pollutants from heavy-duty diesel and gas fuelled vehicles
This Standard specifies PEMS measurement method and technical specification for exhaust pollutants from heavy-duty diesel and gas fuelled vehicles. It is applicable to emission compliance inspection and in-use compliance inspection of new production vehicles of heavy-duty diesel vehicles and gas-fueled vehicles that meet stage 5 of GB 17691-2005.
