3D printers; vending machines; electric welding machines; gas welding machines; vulcanization apparatus; acetylene cleaning apparatus; high pressure washers; apparatus for drawing up beer under pressure; apparatus for aerating water; apparatus for aerating beverages; electrical apparatus for sealing plastics [packaging]; electric arc cutting machines; electric arc welding machines; inking apparatus for printing machines; fittings for engine boilers; expansion tanks [parts of machines]; drums ...