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1. Conical bit rotation as a function of selected cutting parameters / by Carl F. Wingquist ... [et al.]

by Wingquist, Carl F.

Material type: book Book; Format: print Publisher: Washington : U.S. Dept. of the Interior, Bureau of Mines, (1985)Availability: No items available

2. Preliminary evaluation of the relationship of bit wear to cutting distance, forces, and dust using selected commercial and experimental coal-and rock-cutting tools / by Matthew N. Plis, Carl F. Wingquist, Wallace W. Roepke

by Plis, Matthew N | Wingquist, Carl F | Roepke, Wallace W | United States. Bureau of Mines.

Material type: book Book; Format: print Publisher: Washington, D.C. ;Pittsburgh, PA : U.S. Dept. of the Interior, Bureau of Mines, [1988]Availability: No items available