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Suggested hoisting-signal code for slope coal mines and for shaft mines having only one level

Published Year

• 1940-1949 (1)

Subject

• Coal mines and mining--Safety measures (1) *
• Hoisting machinery (1)
• Mine hoisting--Safety appliances (1)
• Mineral industries--Safety measures (1)

Author

• East, J. H. (1) *
• Harrington, D. (1)

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