40 Treatment of water; Water treatment and purification; Water treatment services; Consulting services in the field of water treatment; Waste water treatment services; Waste water treatment services for industrial purposes
37 Installation, maintenance and repair of industrial machinery; Installation, maintenance and repair of CHEMICAL FEED SYSTEMS, WATER SOFTENERS, COOLING TOWERS, PUMPS, WATER AND WASTE WATER TREATMENT EQUIPMENT; Repair or maintenance of boilers