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DE?? ?????? ???
?? 10??? ?? ?????? ???? ??? ??? ??.
?? ???? ?? ?????? ???? ??? ??? ??? ????: ???, ?? ??, ?? ?? ??, ?? ??, ?? ?? ? ??.
Group Standards of the People's Republic of China, ?? ?????? ???
Jilin Provincial Standard of the People's Republic of China, ?? ?????? ???
National Metrological Verification Regulations of the People's Republic of China, ?? ?????? ???
Heilongjiang Provincial Standard of the People's Republic of China, ?? ?????? ???
International Organization for Standardization (ISO), ?? ?????? ???
Taiwan Provincial Standard of the People's Republic of China, ?? ?????? ???
Professional Standard - Agriculture, ?? ?????? ???
German Institute for Standardization, ?? ?????? ???
- DIN 55666:1995 ?? ??, ??? ? ? ???? ?????? ?? ??? ??? ??? ???? ?????? ?? ?? ??