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Converters, electric; high and low voltage switch boards; power switches; electric reactors; on load tap changer (switches, electric); off circuit tap changer (switches, electric); control cabinet, electric, for electrical control and signal input and output; gas insulated metal enclosed switchgear used for high-voltage power system (electric); electric transformers; circuit breakers; semi-metal enclosed composite apparatus used for high-voltage power system (electrical switching equipment); air insulated open composite apparatus used for power system (electrical switching equipment); regulating apparatus, electric; current rectifiers; power plant DC systems consisting of large battery chargers and dischargers and DC operating power supplies; rectifier device for chemical electrolysis (high-power DC power supply with rectification); semi-conductor devices; current converters; industrial power supplies (DC power); high voltage direct current transmission converter valve for transferring electric energy; static dynamic reactive power compensation device used for transferring power, enhancing power of industrial power grid and improving voltage fluctuation; power compensation device used for transferring power, enhancing power of industrial power grid and suppressing harmonic wave; reactive power compensation device for improving power grid capacity of power system; compensation sets for improving power grid capacity of power system; filter sets for filtering harmonic wave of power system; filters; capacitors; lightning conductors [rods]; fuses; surveying apparatus and instruments; wires, electric; cables, electric; electric power converters; navigational instruments; coolers for transformers; radiators for transformers; sensors; power chargers for industrial purposes; electric installations for the remote control of industrial operations. Electrical insulators made of ceramic materials; insulating materials; insulating materials; insulating paint; insulating fabrics; mica, raw or partly processed; insulators; insulating tape; insulating paper; insulating coatings; condenser-type terminal (terms too vague in the opinion of the International Bureau - Rule 13(2)(b) of the Common Regulations).