E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
241/82
E21B 21/00 (2006.01) B02C 17/02 (2006.01) B02C 17/16 (2006.01) B02C 17/18 (2006.01) B02C 19/00 (2006.01) E21B 10/04 (2006.01)
Patent
CA 974218
Cortes Abel C.
Gondolios Elie
Compagnie Francaise Des Petroles
Societe Grenobloise D'etudes Et D'applications Hydrauliques Sogr
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