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DE????? ?? ??
?? 29??? ????? ?? ??? ??? ??? ??.
?? ???? ????? ?? ??? ??? ??? ??? ????: ?? ??, ??, ???? ? ?? ??, ????, ???, ?? ??, ???? ??, ?? ??, ?? ?? ???.
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ????? ?? ??
CZ-CSN, ????? ?? ??
Professional Standard - Machinery, ????? ?? ??
Professional Standard - Chemical Industry, ????? ?? ??
Professional Standard - Aviation, ????? ?? ??
工業(yè)和信息化部, ????? ?? ??
YU-JUS, ????? ?? ??
Group Standards of the People's Republic of China, ????? ?? ??
Professional Standard - Non-ferrous Metal, ????? ?? ??
Indonesia Standards, ????? ?? ??
VN-TCVN, ????? ?? ??