03/314480 DC : DRAFT SEP 2003被替代
EN 50065-4-7 - SIGNALLING ON LOW-VOLTAGE ELECTRICAL INSTALLATIONS IN THE FREQUENCY RANGE 3 KHZ TO 148,5 KHZ AND FROM 1,6 MHZ TO 30 MHZ - PART 4-7: SAFETY OF PORTABLE FILTERS
出版：British Standards Institution
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