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German Institute for Standardization, ?? ????? ?? ???????

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

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

Association Francaise de Normalisation, ?? ????? ?? ???????

Professional Standard - Petrochemical Industry, ?? ????? ?? ???????

GOST, ?? ????? ?? ???????

Korean Agency for Technology and Standards (KATS), ?? ????? ?? ???????

GSO, ?? ????? ?? ???????

SCC, ?? ????? ?? ???????

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

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

KR-KS, ?? ????? ?? ???????

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

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

Professional Standard - Commodity Inspection, ?? ????? ?? ???????

DIN, ?? ????? ?? ???????

Military Standard of the People's Republic of China-General Armament Department, ?? ????? ?? ???????





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