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DE ?? ??
?? 12??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ??? ??? ??? ????: ??? ??, ?? ??, ????.
Military Standard of the People's Republic of China-General Armament Department, ?? ??
Professional Standard - Electron, ?? ??
SCC, ?? ??
Association of German Mechanical Engineers, ?? ??
GSO, ?? ??
British Standards Institution (BSI), ?? ??
Group Standards of the People's Republic of China, ?? ??