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DE?? ??? ???? ??
?? 47??? ?? ??? ???? ??? ??? ??? ??.
?? ???? ?? ??? ???? ??? ??? ??? ??? ????: ?? ?? ??, ?? ??, ?? ?? ??? ? ??, ??? ??.
Professional Standard - Machinery, ?? ??? ???? ??
Group Standards of the People's Republic of China, ?? ??? ???? ??
Professional Standard - Coal, ?? ??? ???? ??
RO-ASRO, ?? ??? ???? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ??? ???? ??
American Petroleum Institute (API), ?? ??? ???? ??
Professional Standard - Light Industry, ?? ??? ???? ??
Professional Standard - Building Materials, ?? ??? ???? ??
Professional Standard - Grain, ?? ??? ???? ??
Professional Standard - Forestry, ?? ??? ???? ??
Professional Standard - Agriculture, ?? ??? ???? ??
Professional Standard - Energy and Power Planning, ?? ??? ???? ??
Professional Standard - Petroleum, ?? ??? ???? ??