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Sand and Gravel Excavation: Part 3: Hydraulic Dredge, Clamshell Dredge, Ladder Dredge, and Dipper Dredge

Published Year

• 1930-1939 (1)

Subject

• Dredges. (1)
• Excavating machinery. (1)
• Gravel. (1)
• Sand. (1) *

Author

• Thoenen, J. R. (1) *

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