Rustproofing; Shipbuilding; Airplane maintenance and repair; Building construction; Building of fair stalls and shops; Construction consultancy; Construction information services; Demolition of buildings; Furniture maintenance; Heating equipment installation and repair; Installation of insulating materials in buildings, roofs and structures; Installation, maintenance and repair of machinery; Installation, maintenance and repair of medical apparatus and instruments; Lift installation and repair; Motor vehicle maintenance and repair; Office machines and equipment installation, maintenance and repair; Real estate development and construction of commercial, residential and hotel property; Sterilisation of medical instruments; Sterilization of medical instruments; Upholstery repair