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Japanese Industrial Standards Committee (JISC), ????? ??

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

工業和信息化部, ????? ??

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

U.S. Military Regulations and Norms, ????? ??

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

Universal Oil Products Company?(UOP), ????? ??

American National Standards Institute (ANSI), ????? ??

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

PL-PKN, ????? ??

BR-ABNT, ????? ??

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

Natural Gas Processor's Association (NGPA), ????? ??

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

HU-MSZT, ????? ??





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