Industrial vacuum cleaners and accessories therefor, namely, hoses and filters for vacuum cleaners for removing soot, ashes, and other debris from chimneys, furnaces and heating ducts

INDUSTRIAL VACUUM CLEANERS AND ACCESSORIES THEREFOR, NAMELY, HOSES, FILTERS AND ELECTRICAL ACCESSORY ADAPTERS, FOR REMOVING SOOT, ASHES, AND OTHER DEBRIS FROM CHIMNEYS, FURNACES AND HEATING DUCTS