Electrical apparatus and machines for cleaning in particular vacuum cleaners, namely, wet-and-dry vacuum cleaners, hand-held vacuum cleaners and back-pack type vacuum cleaners; vacuum cleaners for domestic, commercial and industrial use; accessories for vacuum cleaners, namely, fitted covers, dust filters and bags for vacuum cleaners; attachments for vacuum cleaners, namely, suction nozzles, hoses, wands/rods and electric brush units for vacuum units