37 detection, control and extermination of pests, vermin, insects, parasites and birds (not for agricultural purposes); fumigating services (not for agricultural purposes)[; repair, insulating and waterproofing of buildings; installation of damp proof courses; repair, maintenance, preservation and replacement of windows; replacement of wall ties; maintenance, cleaning and disinfecting of buildings, rooms, washrooms, refuse apparatus, sanitary apparatus, kitchen equipment, air conditioning apparatus, ventilating apparatus, humidifiers, water storage apparatus and water supply apparatus; installation and replacement of receptacles for waste materials and articles; ]installation, replacement, replenishing, cleaning, maintenance and repair of[ vending machines, ]insecticidal apparatus[, drying apparatus, air filtering apparatus, air freshening apparatus, air treating apparatus and of apparatus and materials for office, toilet, washroom, cleaning, sanitary and hygienic purposes; plumbing; clearing of blockage in pipes, drains, and sewers;] rental and leasing of insect killing apparatus, pest control apparatus, and a[pparatus and materials for cleaning purposes; installation, maintenance, repair and rental of sanitary apparatus, sanitizing apparatus, water flushing apparatus, sanitizers, and of apparatus for dispensing detergent, disinfectant and/or deodorizer into toilet or urinal flushing water; cleaning, repairing and restoring of carpets, curtains, upholstery and fabrics; advisory and ]consultancy services relating to pest control [and to the cleaning and maintenance of washrooms]