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DE?? ????
?? 26??? ?? ????? ??? ??? ??.
?? ???? ?? ????? ??? ??? ??? ????: ?? ??, ???, ????, ?? ??, ?? ? ?? ??, ?????, ?? ?? ???, ????, ??, ?? ?? ? ?? ?? ??, ???.
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ????
Group Standards of the People's Republic of China, ?? ????
Professional Standard - Ferrous Metallurgy, ?? ????
Professional Standard - Education, ?? ????
Professional Standard - Petrochemical Industry, ?? ????
American Society for Testing and Materials (ASTM), ?? ????
Korean Agency for Technology and Standards (KATS), ?? ????
British Standards Institution (BSI), ?? ????
U.S. Air Force, ?? ????
RO-ASRO, ?? ????
Taiwan Provincial Standard of the People's Republic of China, ?? ????
Gosstandart of Russia, ?? ????