ZH
EN
JP
ES
RU
DE???? ??
?? 10??? ???? ??? ??? ??? ??.
?? ???? ???? ??? ??? ??? ??? ????: ?? ? ?? ??, ????, ?????, ??? ??, ?? ??.
American Society for Testing and Materials (ASTM), ???? ??
Professional Standard - Non-ferrous Metal, ???? ??
工業(yè)和信息化部, ???? ??
International Telecommunication Union (ITU), ???? ??
National Metrological Verification Regulations of the People's Republic of China, ???? ??
Professional Standard - Electron, ???? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ???? ??