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Electric arc cutting apparatus; Electric soldering apparatus; Electric soldering irons; Electric welding machines; Electric arc welding apparatus; Electric arc welding machines; Electric powered soldering irons; Electrodes for welding machines; Welding apparatus, gas-operated; Welding machines, electric; Welding torches; Gas welding machines; Gas-operated welding machines; Laser welding machines; Oxy-acetylene welding and cutting machines; Power-driven cleaning lances using explosive materials; Power-operated cleaning machines, namely, lances designed to mechanically remove scale and sludge from secondary side tubesheets in steam generators in nuclear power plants