Drawworks for portable drilling rig

Details Drawworks for portable drilling rig Drawworks for portable drilling rig

E - Fixed Constructions

21

B

255/17

E21B 19/00 (2006.01) B66D 1/14 (2006.01) B66D 1/20 (2006.01) E21B 7/02 (2006.01)

Patent

CA 1036150

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