JD Electric&Instrument Factory

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teaching meterteaching meter (jdsmeter)

resistance meterresistance meter (jdsmeter 5)

clamp meterclamp meter (jdsmeter 4)

Demonstrating GalvanometerDemonstrating Galvanometer (jdsmeter 3)

AC voltmeterAC voltmeter (jdsmeter 2)

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JD Electric&Instrument Factory
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