| http://www.w3.org/ns/prov#value | - However, as one of the purposes of the present invention is to increase the adhesion of a coating to the abrasive grains being treated, hard metals which have in the past been thought hard to form into coatings are preferred, some examples of which are Si, Cr, V, B, W, Mo, Ti, Zr, Hf, Nb, Ta, and other members or groups IVa, Va, and VIa of the periodic table.
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