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

工業和信息化部, ??? ???

Gosstandart of Russia, ??? ???

British Standards Institution (BSI), ??? ???

Swedish Institute for Standards, ??? ???

German Institute for Standardization, ??? ???

Ente Nazionale Italiano di Unificazione, ??? ???

International Organization for Standardization (ISO), ??? ???

Spanish Association for Standardization (UNE), ??? ???

Danish Standards Foundation, ??? ???

Association Francaise de Normalisation, ??? ???

National Association of Corrosion Engineers (NACE), ??? ???

Hebei Provincial Standard of the People's Republic of China, ??? ???

廊坊市市場監督管理局, ??? ???

American Society for Testing and Materials (ASTM), ??? ???

Standards Norway, ??? ???

GOST, ??? ???

European Committee for Standardization (CEN), ??? ???

Jiangsu Provincial Standard of the People's Republic of China, ??? ???

Guangxi Provincial Standard of the People's Republic of China, ??? ???

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





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