GDDO-20C AC/DC Electric Meter Calibration Chipangizo chimagwiritsidwa ntchito kuzindikira zolakwika zoyambira pazida zosiyanasiyana zamagetsi zamagetsi zamagetsi, kuphatikiza voltmeter, ammeter, wattmeter, ohmmeter, gawo limodzi & magawo atatu amagetsi amagetsi amagetsi (ngati mukufuna) ndi zolakwika zoyambira DC volt mita ndi ammeter.