VACUUM CLEANERS AND VACUUM CLEANER ATTACHMENTS; CENTRAL VACUUMING SYSTEM, SOLD AS A UNIT COMPRISED OF A CENTRAL VACUUM UNIT, HOSES, WANDS, NOZZLES, BRUSHES, CREVICE TOOLS, FILTER CONES, INLETS, HOSE HOLDERS, ACCESSORY HOLDERS, FELT PADS, ELECTRIC POWER NOZZLES, CONNECTORS, PIPING AND TUBING AND PARTS THEREFOR, FOR DOMESTIC AND/OR INDUSTRIAL USE