Trenchless technology planning, equipment, and methods nork Najafi, Mohammad

Horizontal auger boring projects

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Ice drilling technology 2000 proceedings of the Fifth International Workshop on Ice Drilling Technology, 30 October-1 November, 2000, Nagaoka University of Technology, Nagaoka

Principles of rock drilling nork Rao Karanam, U. M.

High technology in drilling and exploration C.P. Chugh nork Chugh, C.P

Principles of rock fragmentation nork Clark, George Bromley 1912-

A device for measuring drill rod and drill hole orientations nork Matheson, G. D.

Exploratory drilling nork Vozdvizhenskiĭ, Boris I.

Novel drilling techniques nork Maurer, William C.

Mineral formation and structure in the electrochemical induration of weak rocks nork Titkov, Nikilai Iosafovich