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DE?? ??? ?? ??
?? 27??? ?? ??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ?? ??? ??? ??? ??? ????: ?? ? ??(?? ??), ??, ??.
Hunan Provincial Standard of the People's Republic of China, ?? ??? ?? ??
British Standards Institution (BSI), ?? ??? ?? ??
International Organization for Standardization (ISO), ?? ??? ?? ??
SCC, ?? ??? ?? ??
National Metrological Verification Regulations of the People's Republic of China, ?? ??? ?? ??
Professional Standard - Geology, ?? ??? ?? ??
American Society for Testing and Materials (ASTM), ?? ??? ?? ??
National Metrological Technical Specifications of the People's Republic of China, ?? ??? ?? ??
Heilongjiang Provincial Standard of the People's Republic of China, ?? ??? ?? ??
Korean Agency for Technology and Standards (KATS), ?? ??? ?? ??
European Committee for Standardization (CEN), ?? ??? ?? ??
German Institute for Standardization, ?? ??? ?? ??
GSO, ?? ??? ?? ??