Abstract: According to one embodiment of the present invention, a mixture including milk and one or more gas additives is received at a milk processing system. The system heats the mixture and directs it toward an inlet to be delivered into a vacuum chamber. The vacuum chamber applies a negative vacuum pressure to the mixture to substantially remove the added gas. The resulting milk is extracted from the vacuum chamber.

Abstract: A combination abrasive disc and backing plate provide workpiece viewing and blowing collectively through aligned viewing apertures. The backing plate has a bottom surface adapted to support the abrasive disc and an opposed top surface. Coordinated alignment of the viewing apertures of the disc and plate allows observation of a workpiece collectively through the disc and plate during rotary drive thereof. The plate's viewing aperture is partially adjoined by a scoop formation on the plate's top surface. The scoop is arranged for deflecting air from above the plate's top surface and consequently forcing such in a current collectively through the aligned viewing apertures of the disc and plate. This blowing current acts to both blow away debris from the field of view and thereby reduce viewing impairment, as well as to provide some cooling to the workpiece.