Building construction installation and repair services including building construction and construction supervision, bricklaying, plastering, plumbing, wall papering, varnishing, sanding, painting (interior and exterior), paper hanging, masonry, roofing, riveting; airconditioning apparatus installation and repair; boiler and furnace cleaning and repair; building sealing and cleaning (interior and exterior); damp proofing of buildings; electric appliance installation and repair; fire alarm installation and repair; installation and repair of locks including security locks; building insulation, heating and cooling equipment installation and repair; installation and repair of lifts and elevators; cabinet making and repair, furniture maintenance and restoration; factory and warehouse construction and repair; scaffolding; rental of construction equipment including bulldozers, excavators, cranes; civil construction including asphalting, quarrying, shipbuilding, road paving, harbour and pier breakwater building, pipeline construction and maintenance, underwater repair and construction; construction and repair information services