37 Building construction; domestic maintenance, repair and cleaning services in the nature of building caretaker services; installation and assembling of machine plants; maintenance, upkeep and servicing of buildings; street cleaning; car park cleaning; cleaning of articles made of metal, plastic and glass; interior and exterior cleaning of buildings; window cleaning; carpet and upholstery cleaning; facade cleaning; maintenance and repair of cleaning, water treatment, cooling, heating and cooking apparatus and installations and of mechanical high-pressure water jet apparatus, high-pressure water tools, handling machines, positioning devices, feed mechanisms and robots for guiding high-pressure water tools; maintenance and repair of horticultural, agricultural, forestry and municipal apparatus; cleaning, servicing and maintenance of motor vehicles; servicing and cleaning of motor vehicles by provision of motor vehicle cleaning installations and motor vehicle servicing installations; servicing and cleaning of motor vehicles by making available self-service vehicle washing installations in return for payment; rental of machines and mechanical apparatus for cleaning, in particular high-pressure cleaning apparatus, steam cleaning and steam jet apparatus, particle jet apparatus, spray extraction apparatus, brushing machines, vacuum cleaners, floor cleaning machines, vacuuming and wiping robots, floor polishing apparatus, carpet brushing vacuum cleaners, cleaning machines for hard surfaces, cleaning machines for hard floors, cleaning machines for textile covers, sweepers, apparatus for cleaning the inside of containers, cleaning machines for glass surfaces, mechanical window cleaning apparatus, electric automatic window cleaning apparatus, mechanically operated apparatus for cleaning motor vehicles, motor-powered tools for scraping off ice, cleaning machines for parts made of metal, plastic and/or glass, degreasing machines, cleaning robots, air purifiers; rental of electric suction apparatus for industrial purposes; rental of vehicle washing installations; rental of laundry dryers; rental of steam generating apparatus and hot air generating apparatus for cleaning and washing purposes; rental of drying machines, namely air blowers and air dryers; rental of air humidifiers; rental of washing machines, dishwashers and laundry dryers; rental of earth moving machines, motor-powered spreading implements and spreading machines, snow blowers and snow plows, snow clearing machines; rental of clearing machines and clearing blades; rental of pumps for drainage purposes and for irrigation purposes and for supplying service water and drinking water, in particular water pumps, submersible pumps, house water pumps, high-pressure pumps; rental of mechanical high-pressure water jet apparatus for cleaning surfaces; rental of high-pressure water tools, in particular high-pressure lances and high-pressure spray guns; rental of pneumatic, hydraulic, electric or manually driven handling machines, positioning devices, feed mechanisms and robots for guiding high-pressure water tools; consultancy services relating to cleaning, in particular building, path and street cleaning, and relating to organization and optimization of the use of cleaning machines and cleaning apparatus for building, path and street cleaning