Electric meters; Electric testers, namely, circuit testers, electrical outlet tester; magnetic meters and testers, namely, magnetometers; recorders for measurement, namely, electronic data recorders * for electric or magnetic meters and testers *; digital recorders, namely, digital data recorders; data processing equipments, namely, data processors, computers; data processing equipments for measurement, namely, data processors, computers; multipoint recorders, namely, multipoint data recorder...