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Evaluation of a penetrometer for estimating roof-bolt anchorage

Comparison of trip lights and reflectors

Published Year

• 1960-1969 (2) *

Subject

• Mine roof bolting (1)
• Penetrometers--Evaluation (1)
• Reflectors (Safety devices) (1)
• Signal lights (1)

Author

• Stears, J. H. (2) *
• Hood, R. A. (1)
• Mitchell, D. W. (1)
• Oitto, Richard H. (1)

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