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Borehole deformation gage for determining the stress in mine rock

An inexpensive triaxial apparatus for testing mine rock

Published Year

• 1960-1969 (2)

Subject

• Rock mechanics--Measurement--Equipment and supplies (2) *
• Rock pressure (2) *
• Rocks--Testing--Equipment and supplies (1)

Author

• Obert, Leonard, (2)
• Merrill, Robert H. (1)
• Morgan, Thomas A. (1)

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