The Electro-Osteotome. DOUBLE DREDGER. A Russian Petroleum Pipe Line. Comstock Deep Mining. IMPROVED DOUBLE DREDGER., scientific american, 1886-11-06
The Electro-Osteotome. DOUBLE DREDGER. A Russian Petroleum Pipe Line. Comstock Deep Mining. IMPROVED DOUBLE DREDGER., scientific american, 1886-11-06
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