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?? 6??? ??? ??? ??? ??? ??? ??.

?? ???? ??? ??? ??? ??? ??? ??? ????: ?? ??, ????, ?? ??.

Group Standards of the People's Republic of China, ??? ??? ??

• T/ZGIA 106-2020 ??? ???
• T/ZSA 81-2021 ??? ???

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ??? ??? ??

• GB/T 3074.3-1982 ????? ???? ????
• GB/T 3074.3-2008 ????? ???? ????

Professional Standard - Ferrous Metallurgy, ??? ??? ??

• YB/T 5214-2007 ??? ?? ?? ??
• YB/T 5214-1993 ??? ?? ?? ??

??:   ?? ???? ?? ??, ???? ??, ??? ??? ??.