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Development of a successful multiple percussion drill carriage

Equipment tested at the Bureau's oil-shale mine

Published Year

• 1950-1959 (2) *

Subject

• Drilling and boring machinery (1)
• Oil-shales (1)

Author

• Ballinger, Homer J. (2) *
• Brown, Brinton C. (1)
• Burgh, Ernest E. (1)
• Fieg, Lothar. (1)
• Wright, Fred D. (1)

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