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Use of the churn drill at lime-plant quarries

Laboratory studies of variables in rotary drilling

Published Year

• 1920-1929 (1)
• 1960-1969 (1)

Subject

• Rotary percussion drills (2) *
• Drilling and boring machinery (1)
• Lime (1)
• Lime industry--United States (1)
• Quarries and quarrying (1)
• Quarries and quarrying--Equipment and supplies (1)
• Rock-drills (1)

Author

• Bowles, Oliver, (1)
• Whelan, James A. (1)

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