Ammeters; Capacitors; Galvanometers; Rheostats; Transformers; Voltmeters; Capacitance boxes; Digital multimeters; Electric capacitors; Electric resistances; Electric resistors; Electronic components in the nature of capacitors, connectors, filters, oscillators, relays, switches, transformers, resistors, semiconductors, integrated circuits, rectifiers, transistors; Electronic inductors; Measuring apparatus, namely, clamp meters for measuring electricity; Measuring instrumentation and apparatus...