Apparatus for disinfecting water; Aquarium filtration apparatus; Aquarium heaters; Aquarium lights; Disinfectant apparatus for medical purposes; Dripper irrigation systems, comprised of valves, filters and regulators; Ultraviolet ray lamps, not for medical purposes; Water desalination plants; Water filtering apparatus; Water heaters; Water purification installations; Water softening apparatus and installations; Water sterilizers; Cooling installations for water; Diving lights; Germicidal lamp...