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DE??? ??
?? 8??? ??? ??? ??? ??? ??.
?? ???? ??? ??? ??? ??? ??? ????: ??? ?? ? ??? ?? ?? ? ??? ??, ?? ??.
National Metrological Technical Specifications of the People's Republic of China, ??? ??
GSO, ??? ??
HU-MSZT, ??? ??
IL-SII, ??? ??
British Standards Institution (BSI), ??? ??
IPC - Association Connecting Electronics Industries, ??? ??