| http://www.w3.org/ns/prov#value | - More specifically, it is an object of the present invention to provide a process for polishing refractory materials, including CVD diamond films, sapphire and ruby items and materials, and Si3 N4 balls comprising providing a refractory material having an operative surface, softening the operative surface to a predetermined depth by forming a soft ion-implanted layer therein, subjecting the softene
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