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?? 6??? ??? ??? ??? ??? ??.

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

National Metrological Verification Regulations of the People's Republic of China, ??? ??

• JJG 306-2004 24m ?? ?? ???
• JJG 306-1982 24?? Invar ?? ???? ?? ??

National Metrological Technical Specifications of the People's Republic of China, ??? ??

• JJF 1214-2008 ?? ??? ?? ?? ??

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

• GB 16789-1997 ? ? ??? ?? ??

Heilongjiang Provincial Standard of the People's Republic of China, ??? ??

• DB23/T 3461-2023 ????? ???? ????

Professional Standard - Electron, ??? ??

• SJ/T 11491-2015 ?? ??? ??? ?? ???? ???? ???? ??? ?? ?? ??

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