Maintenance and repair of industrial apparatus; Maintenance services for industrial plants; Maintenance, installation and repair of industrial apparatus and instruments; Maintenance, installation and repair of electrical items and equipment; Repair, maintenance and installation advisory services; Repair services; Anti-corrosion treatment services; Application of surface coatings; Application of protective coatings; Application of fireproof materials; Advisory services relating to the maintenance of buildings; Waterproofing of buildings; Pipeline insulation; Pipeline maintenance; Repair of concrete