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Questions and answers on Bureau of Mines approvals of electrical equipment

Drill dust-collectors and drilling equipment with integral dust-collecting systems approved by the Bureau of Mines as of January 31, 1961

Published Year

• 1920-1929 (1)
• 1960-1969 (1)

Subject

• Mineral industries--Equipment (2)
• Mines and mineral resources--Equipment (2) *
• Mining engineering--Equipment (2)
• Electric apparatus and appliances (1)
• Mine dusts (1)

Author

• Anderson, Floyd G. (1)
• Evans, R. L. (1)

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