ZH
EN
JP
ES
RU
DE?? ??
?? 18??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ??? ??? ??? ????: ????, ???, ??, ??????, ????.
Professional Standard - Aerospace, ?? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ??
Korean Agency for Technology and Standards (KATS), ?? ??
RU-GOST R, ?? ??
Professional Standard - Ferrous Metallurgy, ?? ??
German Institute for Standardization, ?? ??