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A hydraulic-powered platform for scaling high backs and walls

Cutting action of rotary bits in oil shale

Published Year

• 1950-1959 (2) *

Subject

• Hydraulic machinery (1)
• Mining machinery (1)
• Oil-shale industry--Equipment and supplies (1)
• Oil-shales (1)
• Rotary cutting (1)
• Shale oils (1)

Author

• Rose, Charles K. (2)
• Utter, Stephen. (2) *
• Morris, Carl. (1)

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