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2 results returnedNotes on the oil-shale industry with particular reference to the Rocky Mountain district
A hydraulic-powered platform for scaling high backs and walls
Published Year
Subject
- Oil-shale industry--Equipment and supplies (2) *
- Hydraulic machinery (1)
- Mining machinery (1)
- Oil-shale industry (1)
- Oil-shale industry--United States (1)
- Oil-shales (1)
- Oil-shales--Rocky Mountains Region (1)
- Oil-shales--United States (1)
Author
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