E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
E21C 37/18 (2006.01) E21B 7/15 (2006.01)
Patent
CA 2661026
The present invention relates to a portable, electrocrushing drilling apparatus and method.
L'invention concerne un foret d'électroconcassage portable et un procédé d'électroconcassage.
Tetra Corporation
Uren John Russell
LandOfFree
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