9 ELECTRICAL APPARATUS AND THEIR PARTS, NAMELY, SWITCHES, COMMUTATORS, INVERTERS, TELESWITCHES, PUSH-BUTTONS, ELECTROMAGNETIC VALVES, THERMOELECTRIC VALVES, RELAYS, CIRCUIT BREAKERS, SIGNAL LAMPS AND BURGLAR ALARMS, WIRES, CABLES, TERMINALS, TRANSFORMERS, LAMPHOLDERS FOR FLUORESCENT LAMPS AND FORM FILAMENT LAMPS