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Some safety practices for metal mines, nonmetal mines (other than coal), mills, metallurgical plants, and quarries.

Published Year

• 1940-1949 (1)

Subject

• Metallurgical plants--Safety measures (1) *
• Mines and mineral resources--Safety measures (1)
• Ore-dressing plants--Safety measures (1)
• Quarries and quarrying--Safety measures (1) *

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