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?? 2??? ???? ????? ??? ??? ??.

?? ???? ???? ????? ??? ??? ??? ????: ?? ??, ???.

Group Standards of the People's Republic of China, ???? ????

• T/CEC 636-2022 ???? ? ???? ????? ????

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ???? ????

• GB/T 11742-1989 ???? ?? ? ???? ???? ???? : ????? ?????

??:   ?? ??, ????, ???? ????, ???? ????, ???? ?? ??, ?????? ????, ????, ???? ????, ?? ??, ???? ??, ??? ???? ????, ???? + ????, ???? + ??, ?????? ????, ???? ??, ?? ????.