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The relation of table feed preparation to table efficiency

Development of sand and gravel deposits

Sand and gravel excavation.

Sand and gravel excavation.

Sand and gravel excavation.

Sand and gravel excavation.

Sand and gravel excavation.

Sealing openings in abandoned mines by pneumatic stowing

Published Year

• 1920-1929 (1)
• 1930-1939 (6)
• 1980-1989 (1)

Subject

• Sand (8) *
• Gravel (7)
• Excavating machinery (4)
• Mine haulage (2)
• Compressed air (1)
• Gravity concentrators (1)
• Mine filling (1)
• Mining engineering (1)
• Sand and gravel industry (1)
• Silica (1)
• Stone, Crushed (1)
• Tailings (Metallurgy) (1)

Author

• Thoenen, J. R. (6)
• Fahrenwald, A. W. (1)
• Lipscomb, Jennings R. (1)
• Maksimovic, S. D. (1)
• Meckel, W. F. (1)

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