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

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

CN-DB 3, ??? ???? ??

GM Daewoo, ??? ???? ??

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

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

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

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

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

Gosstandart of Russia, ??? ???? ??

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

American Petroleum Institute (API), ??? ???? ??

Professional Standard - Labor and Labor Safety, ??? ???? ??

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

American Water Works Association (AWWA), ??? ???? ??

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





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