73175648
Jun 22, 1978
Oct 9, 1979
INDUSTRIAL VACUUM CLEANING SYSTEM COMPRISING A CENTRAL VACUUM CHAMBER IN WHICH ARE HOUSED AN ELECTRIC MOTOR, BLOWER AND FILTER, AND DUCTS AND CLEANING ATTACHMENTS THEREFOR
MachineryDOMESTIC VACUUM CLEANING SYSTEM COMPRISING A CENTRAL VACUUM CHAMBER IN WHICH ARE HOUSED AN ELECTRIC MOTOR, BLOWER AND FILTER, AND DUCTS AND CLEANING ATTACHMENTS THEREFOR
Electrical and Scientific Apparatus