| http://www.w3.org/ns/prov#value | - A treating material, such as carbon dioxide, is injected into the cylinder, and the pressure in the cylinder is increased... 36 5438729 Apparatus for cleaning air ducts A cleaner for air distributing duct systems of buildings has a motor driven fan for developing a vacuum for the suction of contaminants and air from the interior of the ducts and for forcing the... 37 5416947 Portable cleaning devi
|
