37 Repair or maintenance of loading-unloading machines and apparatus, and providing information relating thereto; repair or maintenance of office machines and apparatus, and providing information relating thereto; repair or maintenance of boilers, and providing information relating thereto; repair or maintenance of electronic machines and apparatus, and providing information relating thereto; repair or maintenance of telecommunication machines and apparatus, and providing information relating thereto; repair or maintenance of construction machines and apparatus, and providing information relating thereto; repair or maintenance of consumer electric appliances, and providing information relating thereto; repair or maintenance of LED (light-emitting diodes) lighting apparatus, and providing information relating thereto; repair or maintenance of power distribution or control machines and apparatus, and providing information relating thereto; repair or maintenance of power generators, and providing information relating thereto; repair or maintenance of photovoltaic generators, and providing information relating thereto; repair or maintenance of electric motors, and providing information relating thereto; repair or maintenance of medical machines and apparatus, and providing information relating thereto; repair or maintenance of metalworking machines and tools, and providing information relating thereto; repair or maintenance of molds and dies for metal forming, and providing information relating thereto; repair or maintenance of press dies for metal forming, and providing information relating thereto; repair or maintenance of forging molds, and providing information relating thereto; repair or maintenance of molds for plastics, and providing information relating thereto; repair or maintenance of machines and apparatus for processing food or beverages, and providing information relating thereto; repair or maintenance of plastic processing machines and apparatus, and providing information relating thereto; repair or maintenance of injection molding machines, and providing information relating thereto; repair or maintenance of mechanical parking systems, and providing information relating thereto; repair or maintenance of vehicle washing installations, and providing information relating thereto; repair or maintenance of vending machines, and providing information relating thereto; repair or maintenance of water purifying apparatus, and providing information relating thereto; repair or maintenance of waste compacting machines and apparatus, and providing information relating thereto; repair or maintenance of waste crushing machines and apparatus, and providing information relating thereto; operation and maintenance of building equipment for others, and providing information relating thereto; shipbuilding; repair or maintenance of vessels, and providing information relating thereto; repair or maintenance of aircraft, and providing information relating thereto; repair or maintenance of railway rolling stocks, and providing information relating thereto; rental of construction machines and apparatus, and providing information relating thereto; rental of attachments for building machines, and providing information relating thereto; rental of construction equipment in the nature of cranes, and providing information relating thereto; rental of loading-unloading machines and apparatus for engineering and construction, and providing information relating thereto; rental of commercial vacuum cleaners for automobiles, and providing information relating thereto; rental of mat cleaning machines for automobiles, and providing information relating thereto; rental of automobile maintenance apparatus, and providing information relating thereto; rental of cleaning machines for aircraft, and providing information relating thereto; rental of automobile repair apparatus, and providing information relating thereto; repair and maintenance of 3D printers, and providing information relating thereto