✦ LIBER ✦

State of the art in blind shaft drilling : Pigott, C P Proc Conference on Shaft Engineering, Harrogate, 5–7 June 1989P341–344. Publ London: IMM, 1989

No coin nor oath required. For personal study only.

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Stability of liners in shaft design : Pr

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Shaft sinking at Sikfors power station :

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