[ Air filtering installations; Air purifying apparatus and machines; Aquarium filtration apparatus; Bed warmers; Boilers for heating installations; Coffee filters not of paper being part of electric coffee makers; Component parts of water cooling towers in the nature of wire mesh hangers for securing slat fill; Cooling installations for water; Disposable sterilization pouches, not for medical use; Electric footwarmers; Electric radiators; Electric stoves; Electro-chemical flue gas scrubbing m...