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DE?? 20? ???
?? 52??? ?? 20? ???? ??? ??? ??.
?? ???? ?? 20? ???? ??? ??? ??? ????: ??? ? ?? ??, ?? ? ?? ??? ??, ?? ??, ?? ?? ??, ???, ???, ???, ?? ??, ???? ??, ??? ?? ?? ? ??.
IT-UNI, ?? 20? ???
Ente Nazionale Italiano di Unificazione, ?? 20? ???
Group Standards of the People's Republic of China, ?? 20? ???
Military Standards (MIL-STD), ?? 20? ???
Japanese Industrial Standards Committee (JISC), ?? 20? ???
International Organization for Standardization (ISO), ?? 20? ???
CEN - European Committee for Standardization, ?? 20? ???
Underwriters Laboratories (UL), ?? 20? ???
British Standards Institution (BSI), ?? 20? ???
CZ-CSN, ?? 20? ???
Association Francaise de Normalisation, ?? 20? ???
RO-ASRO, ?? 20? ???
Hubei Provincial Standard of the People's Republic of China, ?? 20? ???
Korean Agency for Technology and Standards (KATS), ?? 20? ???
European Committee for Standardization (CEN), ?? 20? ???
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? 20? ???
Spanish Association for Standardization (UNE), ?? 20? ???
TN-INNORPI, ?? 20? ???
American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), ?? 20? ???
Professional Standard - Medicine, ?? 20? ???
German Institute for Standardization, ?? 20? ???
GCC Standardization Organization, ?? 20? ???
The Directorate General of Specifications and Metrology (DGSM) , ?? 20? ???
Professional Standard - Non-ferrous Metal, ?? 20? ???
Standards Norway, ?? 20? ???
Swedish Institute for Standards, ?? 20? ???