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DE?? ???
?? 22??? ?? ???? ??? ??? ??.
?? ???? ?? ???? ??? ??? ??? ????: ???, ???, ??? ?? ?? ??, ??, ?? ? ??, ?? ? ???, ?? ??, ???? ????.
Group Standards of the People's Republic of China, ?? ???
British Standards Institution (BSI), ?? ???
Professional Standard - Construction Industry, ?? ???
International Electrotechnical Commission (IEC), ?? ???
GCC Standardization Organization, ?? ???
The Directorate General of Specifications and Metrology (DGSM) , ?? ???
Bureau of Indian Standards, ?? ???
Kingdom of Bahrain Testing and Metrology Directorate, ?? ???
Professional Standard - Electron, ?? ???
Military Standard of the People's Republic of China-General Armament Department, ?? ???