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electric couplings; electric welding apparatus, namely, electric arc welders, welding torches, welding electrodes, welding brazers; electrical power distribution control machines and apparatus, namely, power distribution blocks, switchboards, hybrid circuits, hybrid integrated circuits; rotary converters, namely, phase modifiers; batteries and electrical cells; magnetic cores; electrodes; electronic publications, namely, books, magazines and manuals featuring power transmission equipment, all recorded on electronic media