E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
255/13
E02D 3/02 (2006.01) E02D 3/08 (2006.01) E21B 1/00 (2006.01) E21B 4/14 (2006.01)
Patent
CA 950445
Gurkov Konstantin S.
Kostylev Alexandr D.
Lipovetsky Lazar M.
Tkach Khaim B.
LandOfFree
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