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Establishing of line and grade in concrete-lined, elliptical, inclined shafts of city deep, limited
Method employed in establishing center lines and side grade pegs in concrete and rock in deep level inclined shafts at City Deep, and procedure adopted to ensure correct alignment of center line pegs; survey work in preliminary stages of shaft sinking.
Establishing of line and grade in concrete-lined, elliptical, inclined shafts of city deep, limited
Method employed in establishing center lines and side grade pegs in concrete and rock in deep level inclined shafts at City Deep, and procedure adopted to ensure correct alignment of center line pegs; survey work in preliminary stages of shaft sinking.
Establishing of line and grade in concrete-lined, elliptical, inclined shafts of city deep, limited
Inst Mine Surveyors S Africa -- J
Heller, J.E. (author) / Rapoport, D. (author)
1954
9 pages
Article (Journal)
English
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