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DEn-?? ? ?? ???
?? 23??? n-?? ? ?? ???? ??? ??? ??.
?? ???? n-?? ? ?? ???? ??? ??? ??? ????: ????, ????, ?? ??, ?? ??.
European Committee for Standardization (CEN), n-?? ? ?? ???
RU-GOST R, n-?? ? ?? ???
British Standards Institution (BSI), n-?? ? ?? ???
Association Francaise de Normalisation, n-?? ? ?? ???
SCC, n-?? ? ?? ???
International Organization for Standardization (ISO), n-?? ? ?? ???
CEN - European Committee for Standardization, n-?? ? ?? ???
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, n-?? ? ?? ???
Korean Agency for Technology and Standards (KATS), n-?? ? ?? ???
Natural Gas Processor's Association (NGPA), n-?? ? ?? ???
American Society for Testing and Materials (ASTM), n-?? ? ?? ???