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???? + ?????

?? 3??? ???? + ?????? ??? ??? ??.

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

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

• JJG(教委) 04-1992 ?? ???? ?? ???? ?? ??

Professional Standard - Agriculture, ???? + ?????

• JJG(教委) 004-1996 ?? ? ??? ???? ?? ???? ?? ??

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

• JJF 1158-2006 ?? ???? ?? ?? ??? ?? ??

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