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A hydraulic-powered platform for scaling high backs and walls
Cutting action of rotary bits in oil shale
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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)