English translation: Wet pressure jet polishing system
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Explanation: I found this explanation, - mind you it refers to optical equipment
Fluid jet polishing, which began as a doctoral research project in the
university's Optics Research Group, applies a slurry jet to optical surfaces.
Unlike abrasive slurry jet systems -- which use pressures of anywhere from 70 to 5400 bar -- fluid jet polishing applies less than 6 bar, resembling the pressures usually obtained during superpolishing or elastic emission polishing.
However, unlike elastic emission polishing, the new processing tool does not come in contact with the optical surface.