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(11) 99514 (51) (2015.01)
E21B 37/00
E21B 27/00
(24) 10.06.2015
(21) u201413634 (22) 19.12.2014
(46) 10.06.2015, . 11
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Trotska Yevhenia Vasylivna (UA ); Motsak Volodymyr Oleksiiovych (UA ); Velychko Halyna Oleksandrivna (UA ); Kryvulia Sergii Viktorovych (UA ); Koroliuk Valentyn Volodymyrovych (UA )
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DEVICE FOR CLEANING bottom hole
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