74022837
Jan 26, 1990
Oct 16, 1990
maintenance, repair, unblocking, cleaning, clearing, descaling, sterilizing, disinfecting, fumigating and deodorising of drainage and of piping systems, sewers, manholes, gratings, culverts, gullies, flues and channels for the passage of liquids, solids or gases; cleaning and clearing of pipework systems used in the manufacturing and refining industries; clearing of tree roots; cleaning and degreasing of exterior and interior floor, ceiling and wall surfaces; cleaning by means of sanding, scouring or blasting; hygienic cleaning of buildings, tanks, and pools
Building Construction and Repair