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DE?? ??
?? 27??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ??? ??? ??? ????: ?? ?? ???, ?? ? ?? ??? ??, ?? ??, ??.
Professional Standard - Machinery, ?? ??
Professional Standard-Ships, ?? ??
Group Standards of the People's Republic of China, ?? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ??
Professional Standard - Coal, ?? ??
Professional Standard - Aviation, ?? ??
Professional Standard - Railway, ?? ??
Japanese Industrial Standards Committee (JISC), ?? ??
U.S. Military Regulations and Norms, ?? ??