YEW

ELECTRICAL INSTRUMENTS SUCH AS INDUSTRIAL MEASURING APPARATUSES, AUTOMATIC CONTROLLING METERS, ELECTRONIC AUTOMATIC BALANCING METERS; ELECTRIC METERS SUCH AS VOLTMETERS, AMMETERS, WATTMETERS, FREQUENCY METERS, ETC., ELECTRIC INDICATORS SUCH AS GALVANOMETERS, D. C. POTENTIOMETERS, AMPLIFIERS, ELECTRIC TESTERS, AND OSCILLOGRAPHS