E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
E21C 37/18 (2006.01)
Patent
CA 2658570
The present invention relates to a portable, directional electrocrushing drilling apparatus and method.
La présente invention concerne un appareil et un procédé de forage par électroconcassage portable et directionnel.
Moeny William
Tetra Corporation
Uren John Russell
LandOfFree
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