H

BUILDING, CONSTRUCTION AND MAINTENANCE OF [VESSELS, BOATS, SHIPS, TUGBOATS, FISHING BOATS, DRAGGING BOATS, DRY DOCKS AND DRY DOCK FACILITIES, WHARFS, QUAYS, PANELLINGS, DAMS, PIERS, BRIDGES,] OFFSHORE PLATFORMS, INCLUDING PLATFORMS FOR RESEARCH AND PRODUCTION OF OIL, [LIGHT TOWERS AND LIGHT HOUSES, PLATFORMS FOR SULPHUR MINING, DOCKING AND MOORING PLACES, LOADING DOCKS, POWER INSTALLATIONS AND INDUSTRIAL INSTALLATIONS AND FACTORIES;] BUILDING AND CONSTRUCTING [PIPELINES, DRAINAGE SYSTEMS,] OIL AND GAS PRODUCTION FACILITIES[, LIGHT-INSTALLATIONS, ROADS, WELLS AND SHAFTS; REPAIR OF VESSELS, THE DRAGGING OF RIVERS AND OTHER WATERWAYS]