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DE?? ??
?? 12??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ??? ??? ??? ????: ?? ??, ???.
Professional Standard - Machinery, ?? ??
機械工業部, ?? ??
Military Standard of the People's Republic of China-Commission of Science,Technology and Industry for National Defence, ?? ??
工業和信息化部, ?? ??
Group Standards of the People's Republic of China, ?? ??
National Metrological Verification Regulations of the People's Republic of China, ?? ??
Professional Standard - Ferrous Metallurgy, ?? ??
HU-MSZT, ?? ??
Professional Standard - Petroleum, ?? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ??