Asphalting; drilling of wells; rebuilding engines that have been worn or partially destroyed; rebuilding machines that have been worn or partially destroyed; retreading of tires (tyres); building sealing; mining extraction; knife sharpening; building insulating; repair information; construction information; bricklaying; riveting; varnishing; re-tinning; scaffolding; road paving; car wash; vehicle wash; building construction supervision; rustproofing; anti-rust treatment for vehicles; strong-room maintenance and repair; vehicle maintenance; painting or repair of signs; cleaning of buildings (exterior surface); vehicle polishing; rental of road sweeping machines; rental of cleaning machines; rental of construction equipment; rental of bulldozers, rental of excavators, rental of cranes (construction equipment); plumbing; masonry; roofing services; painting, interior and exterior; underwater repair; cabinet making (repair); plastering; quarrying services; repair of security locks; motor vehicle maintenance and repair; burner maintenance and repair; airplane maintenance and repair; safe maintenance and repair; pump repair; vehicle repair; vehicle greasing; demolition of buildings; warehouse construction and repair; vehicle service stations (refuelling and maintenance); pipeline construction and maintenance; pier breakwater building; underwater construction; harbour construction; factory construction; construction; shipbuilding; artificial snow-making services; irrigation devices installation and repair; elevator installation and repair; heating equipment installation and repair; burglar alarm installation and repair; furnace installation and repair; air conditioning apparatus installation and repair; fire alarm installation and repair; freezing equipment installation and repair; electric appliance installation and repair; installation, maintenance and repair of computer hardware; machinery installation, maintenance and repair; interference suppression in electrical apparatus; boiler cleaning and repair; vehicle cleaning; pumicing, sanding