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Diamond drilling blast holes, Bell Mine, the Warner Co., Centre County, Pa.
Diamond-drilling blast holes, Bellefonte Mine, National Gypsum Co., Centre County, Pa.
Diamond-drilling blast holes, Eastern Magnetite Mine C
Blast-hole drilling with diamond drills at the Tennessee Copper Co. mines, Ducktown, Tenn.
Blast-hole diamond drilling in California mines
Effects of core recovery, diamond size, and quality on cost of core drilling in gneiss
Diamond orientation in diamond bits :procedures and preliminary results
Diamond orientation in diamond bits :a method of identifying hard vectors for setting purposes
Diamond orientation in diamond bits.
Diamond-bit performance in schist
Diamond-bit performance in limestone and dolomite
Diamond-bit performance in sandstone
Diamond-bit performance in cherty limestone and cherty dolomite