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AIR APPLIANCE PRODUCTS INCLUDING INDUSTRIAL BLOWERS AND EXHAUSTERS, PORTABLE AND STATIONARY INDUSTRIAL VACUUM CLEANING SYSTEMS, PNEUMATIC CONVEYING EQUIPMENT, DUST COLLECTORS, CONTINUOUS STRIP AND SHEET DRYERS FOR THE METALWORKING INDUSTRIES; INDUSTRIAL FILTRATION EQUIPMENT INCLUDING MAGNETICTYPE SEPARATORS, FLOTATION-TYPE CLARIFIERS, DISPOSABLE FILTER MEDIA-TYPE FILTERS, DIATOMACEOUS EARTH-TYPE FILTERS AND OTHER FILTRATION SYSTEMS; AND PARTS AND ACCESSORIES OF THE FOREGOING