Residential and commercial building construction, underwater dredging, road paving, masonry services, installation of glass windows, structural steel construction, plastering, carpentry, tile laying, brick laying, block laying, joinery, reinforcing rod installation work prior to concrete deposition for ferro-concrete buildings, building painting, construction of scaffolding, excavation services, namely, earthworks and laying of concrete to support building construction, interior finishing, namely, sealing and caulking, building sealing and damp-proofing, roofing installation, plumbing services, installation of heavy-weight construction machinery, such as generators and large tooling machines, well drilling, electrical contracting, telephone installation, installation of building insulation, custom shipbuilding, repair and maintenance of ships and boats, repair and maintenance of airplanes, repair of bicycles, repair and maintenance of motor vehicles, repair and maintenance of railway vehicle rolling stock, repair and maintenance of motorcycles, rental and leasing of construction equipment, operation of construction equipment for others, repair and maintenance of mechanical parking installations, repair and maintenance of metal working machines and tools, repair and maintenance of plowing machines and implements other than hand tools, repair and maintenance of mine working machines and instruments, repair and maintenance of rubber processing machines, repair and maintenance of construction machines and apparatus, repair and maintenance of plastic processing machines, repair and maintenance of semi-conductor manufacturing apparatus, repair and maintenance of waste crushing and shredding apparatus, repair and maintenance of waste compacting machines - excluding services related to ecological restoration or reclamation of land

Metal plating

General civil engineering - excluding services related to ecological restoration or reclamation of land