Thermic lances (machines); Electric arc welding apparatus; Electric arc cutting apparatus; Waste disposals; Trash compacting machines; Electric welding apparatus; Welding apparatus, gas-operated; Gasifiers for gaseous and/or liquid fuels for internal combustion engines; Washing apparatus; Alternators; Steam engine boilers; Spray guns for paint; Cutting machines; Feeding apparatus for engine boilers; Pumps for the extraction of gases (machines); Blowing machines for the compression, exhaustion and transport of gases