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Metal components for constructing lightning protection and earthing installations [construction materials], in particular for constructing arresters, roof conductors, cable holders, roof cable supports, rod holders, clips, in particular connecting and jointing clamps, bracket dividers, test clips, earthing rods, pipe clips, in particular earthing pipe clamps, screws, connecting pieces, cover sheets, cover caps, ladders, crampons and crowns of metal for chimneys, in particular factory chimneys. Hand-operated tools for use in construction of lightning conductors and earthing installations; hand-operated wire straighteners; rammers [hand tools] for driving in deep driven earthing rods (except machine powered ramming equipment); safety pliers. Lightning conductors, electric cables and wires for earthing and lightning protection installations, electric switches, electric cable connectors, foundation earthing and potential equalisation elements, profiled earthing lightning rods, deep-driven earthing lightning rods, earthing lightning pipes and rods, voltage surge protectors, spark gaps, surge counters, earthing meters and measuring sets, safety devices for work on electrical installations, in particular switching rods, earthing and short-circuit equipment for indoor and outdoor installations, earthing lightning arrester equipment for railway installations, earthing lightning rods, earthing and short-circuit equipment for low-voltage cables and cable junctions, and discharge rods, voltage testers; earthing rods. Installation, construction, maintenance, servicing and repair of lightning protection and earthing installations; repair or maintenance of electrotechnical installations.