ELECTROTECHNICAL AND/OR ELECTRONIC APPARATUS AND INSTRUMENTS-NAMELY, SWITCH, CONTROL [ AND CURRENT AND VOLTAGE REGULATORS, ] TRANSFORMERS, CONVERTERS, [ CONSTANT VOLTAGE TRANSFORMERS, ] SWITCHBOARD TERMINALS-ALL THE ABOVE-MENTIONED GOODS BEING INTENDED FOR USE ONLY AS INSTRUMENTS OR APPARATUS FOR ELECTRIC CURRENT NETWORKS OR AS COMPONENTS FOR SYSTEMATIC REGULATION OF ELECTRIC CURRENT SUPPLY, POWER SUPPLY UNITS, [ IONIZATION UNITS FOR ELIMINATING ELECTROSTATIC CHARGES, ] ELECTRICAL BATTERIES AND ACCUMULATORS, ELECTRICAL CHARGING UNITS IN ARRANGEMENTS OF SINGLE, MULTIPLE OR STACK, DISTRIBUTION BOXES, CONNECTION AND DISTRIBUTION BOXES, ELECTRICAL PLUG-IN CONNECTORS, ELECTRICAL PLUGS, FUSES, ELECTRIC CABLES, ELECTRIC CABLE REELS, ELECTRICAL CONNECTIONS NAMELY, SOCKETS, EMERGENCY AND SAFETY ELECTRIC LIGHTS FOR USE IN MINES; [ REPAIR AND INSTALLATION OF ELECTROTECHNICAL APPARATUS IN THE FORM OF INSTRUMENTS OR APPARATUS FOR ELECTRIC CURRENT NETWORKS OR COMPONENTS FOR SYSTEMATIC REGULATION OF ELECTRIC CURRENT SUPPLY AND FOR POWER SUPPLY UNITS AND LIGHTING AND LAMPS FOR USE IN MINES AND BY MINERS ]; ELECTRIC LAMP FIXTURES, FLAME PROOF ELECTRIC LIGHT BULBS; [ LEASING OF LIGHTING AND LAMPS FOR USE IN MINES AND BY MINERS ]