A method for conserving carbon dioxide vapor in a carbon dioxide dry cleaning system employing a liquid carbon dioxide cleaning solution to clean articles, where the method includes removing carbon dioxide vapor from a wash tank to a vapor tank, storing the carbon dioxide vapor in the vapor tank; and charging the wash tank with carbon dioxide vapor from the vapor tank. In particular, techniques are disclosed for automatically removing personally identifying information from spoken audio signals and replacing such information with non-personally identifying information. The duct includes a deconsolidator configured to fragment particle agglomerates received from the passage. Instead, visual user interfaces may be displayed on the window through which the individual operates the vehicle to presents visuals representing travel information received from a travel service, such as routing, traffic congestion, highlighting vehicles or routes, and rendering non-visible objects. The scanning electron microscope includes an electron beam source generating a primary electron beam, a condenser lens converging the primary electron beam, a base plate with a diamond film formed on the surface thereof having an aperture for passing of the primary electron beam, and a scanning unit two-dimensionally scanning a specimen with the primary electron beam.