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DE?????? ????
?? 41??? ?????? ????? ??? ??? ??.
?? ???? ?????? ????? ??? ??? ??? ????: ????, ?? ??, ????, ?? ?? ??? ? ?? ????, ?? ??, ??? ? ???, ???? ??? ?? ? ??, ?? ??, ?? ??, ???, ???, ??? ?? ?? ??, ?? ??, ???? ??, ?? ?? ??, ?? ?? ??, ???.
Group Standards of the People's Republic of China, ?????? ????
Professional Standard - Non-ferrous Metal, ?????? ????
中華人民共和國國家質量監督檢驗檢疫總局、中國國家標準化管理委員會, ?????? ????
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?????? ????
RU-GOST R, ?????? ????
Professional Standard - Post and Telecommunication, ?????? ????
Professional Standard - Machinery, ?????? ????
Shandong Provincial Standard of the People's Republic of China, ?????? ????
工業和信息化部, ?????? ????