PIPE SEALING UNIT FOR DIE PREVENTER von CHASOVSKIKH A.I, MATVEEV S.N, BALASHOV V.A, MALAKHOVA L.A, ZAJTSEVA L.A, KOLOTIJ M.A, BEZLEPKINA T.A, CHAGIN S.B, BONDAR' A.V, KUZNETSOV V.V

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HAULING CHAIN TO SINK AND LIFT CONTINUOUS STEEL PIPES von JURTSVAJG V.I, MATVEEV S.N, MALYSHEV O.M, BALASHOV V.A, GLADYSHEV A.B, KOLOTIJ M.A, KUZNETSOV V.V, GORDON K.A

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LIFTING SET SERVICING OIL AND GAS WELLS von KARABANOV M.F, KHASHUTOGOV I.A, KOLOTIJ M.A, LEPEKHA A.I, DOMOGATSKIJ V.V, TARSHIN P.S

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