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See Chinese contents: HJ 1239.3-2021 HJ 1239.3-2021: Technical specification for emission remote supervision system of heavy-duty vehicles - Part 3: Communication protocol and data format
This standard specifies the protocol structure, communication connection, data packet structure and definition, and data unit format and definition of data transmission of emission remote supervision system of heavy-duty vehicles. This standard applies to the transmission of emission remote supervision system of heavy-duty vehicles.
