摘要：

Patented Mar. 18, 1952 RESIN, ABRASIVE ARTICLET NCORPORATQ ING' smvnaz, AND' METHOD OF MAKING SAME Hugh V; Allison,-Fairfield, Conn, assignor to The Allison Company; Bridgeport Conn a crporation of Connecticut N0 Drawing. Application'March 20,1950} Serial No. 150,800

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