37 Construction Services-Namely, Building Construction, Bridge Building, Roadbed Construction, Earthwork and Foundation Building, Erection of Reinforced Concrete Structures, Installation of Earth and Rock Anchors, Installation and Assembly of Industrial Plants, Shipbuilding, Chimney Construction, Construction of Tunnels and Galleries, Repair and Maintenance Work on Structures, Demolition Work, Excavation Work, Paving and Tiling Work, Blasting Work, Highway and Road Construction