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Keywords: vertical surface
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Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-058
..., and aperture were measured and joint trace map was made. Objected survey area is 49.95 m2 as horizontal area and is 13.5 m2 as vertical surface. 2. Topographical survey (outcrop sur- face) Concise survey was carried out to grasp topographical conditions of outcrop sur- face. 2.2 Surveys using boreholes Three...

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