ZH
EN
JP
ES
RU
DE?? ??
?? 45??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ??? ??? ??? ????: ?? ??, ???, ?? ? ?? ??? ??, ?? ??, ??, ???? ?? ??? ? ??, ?? ?? ??, ????, ?? ?? ??, ??????, ??, ?? ?? ??, ??, ?? ??, ?? ??? ?? ? ????, ????, ?? ??.
Professional Standard - Coal, ?? ??
Japanese Industrial Standards Committee (JISC), ?? ??
Professional Standard - Education, ?? ??
American Society for Testing and Materials (ASTM), ?? ??
CZ-CSN, ?? ??
SCC, ?? ??
British Standards Institution (BSI), ?? ??
Association Francaise de Normalisation, ?? ??
HU-MSZT, ?? ??
ES-AENOR, ?? ??
Group Standards of the People's Republic of China, ?? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ??
Taiwan Provincial Standard of the People's Republic of China, ?? ??
Korean Agency for Technology and Standards (KATS), ?? ??
US-FCR, ?? ??