ZH
EN
JP
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RU
DE??? ???? ????
?? 34??? ??? ???? ????? ??? ??? ??.
?? ???? ??? ???? ????? ??? ??? ??? ????: ?? ? ?? ???, ?? ??, ?? ? ?? ?? ??, ?? ? ?? ??, ??? ??, ?????, ?? ??, ??, ?? ??, ?? ??, ?????, ??? ??.
U.S. Military Regulations and Norms, ??? ???? ????
PL-PKN, ??? ???? ????
Korean Agency for Technology and Standards (KATS), ??? ???? ????
Professional Standard - Meteorology, ??? ???? ????
Group Standards of the People's Republic of China, ??? ???? ????
International Electrotechnical Commission (IEC), ??? ???? ????
British Standards Institution (BSI), ??? ???? ????
German Institute for Standardization, ??? ???? ????
American Society for Testing and Materials (ASTM), ??? ???? ????
RU-GOST R, ??? ???? ????
SCC, ??? ???? ????
ES-UNE, ??? ???? ????
GSO, ??? ???? ????
Professional Standard - Coal, ??? ???? ????
IN-BIS, ??? ???? ????
- IS 8525-1977 ??? ???? ? ???? ?? ?? ? ??? ????? 0.33-1.25%? ?? ???? ?????.