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Reduction in frictional ignition due to conical coal-cutting bits

Published Year

• 1980-1989 (1)

Subject

• Coal-cutting bits--Testing (1)
• Mine fires--Prevention and control (1) *

Author

• Cheng, Lung. (1)
• Courtney, Welby G. (1) *
• Furno, A. L. (1)

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