Office machines and equipment installation, maintenance and repair; strong-room maintenance and repair; mining extraction; vehicles maintenance and repair; kitchen equipment installation and repair; telephone installation and repair; electric appliance installation and repair; elevator installation and repair; burglar alarm installation and repair; airplane maintenance and repair; dry cleaning; heating equipment installation and repair; machinery installation, maintenance and repair; installation, maintenance and repair of computer hardware; furniture maintenance; construction; construction information; restoration of musical instruments; freezing equipment installation and repair; retreading of tires [tyres]; knife sharpening; varnishing; pump repair; interference suppression in electrical apparatus; artificial snow-making services; upholstering; hand tool repair; installation and repair of sanitation facilities; disinfecting; umbrella repair; shoe repair; installation and repair of medical equipments; restoration of works of art; swimming-pool maintenance; installation and repair of recreational sports facilities; shipbuilding; installation and repair of lighting facilities; photographic apparatus repair; clock and watch repair; repair of jewelry

Cloud seeding; conversion of data or documents from physical to electronic media; material testing; surveying; weighing goods for others; dress designing; industrial design; chemistry services; mechanical research; technical project studies; computer software design; technical project studies in the field of construction; meteorological information; biological research; calligraphy and engraving art design; providing search engines for the Internet; hosting computer sites [web sites]; authenticating works of art; quality testing