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xlxu 发表于 2009-5-14 17:32:02

IEC 62053-31:1998, Electricity metering equipment (a.c.) .. Part 31

IEC 62053-31:1998, Electricity metering equipment (a.c.) – Particular requirements – Part
31: Pulse output devices for electromechanical and electronic meters
(two wires only)

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