METHOD OF RECIRCULATING DRILLING MUD IN WELL von SHAPIRO ALEKSANDR P,SU, KUROCHKIN BORIS M,SU, BUKHMAN YURIJ A,SU, PROKUNIN ALEKSANDR N,SU, DRATSKIJ PAVEL N,SU, GORBUNOVA IRINA V,SU, LITVINOV ALEKSANDR I,SU, KRUTIKOVA OLGA N,SU

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REVOLVING SHAFT SEAL von KONSTANTINOV IGOR L,SU, SHUMILOV VALERIAN P,SU, SYSOEV VLADIMIR I,SU, BUKHMAN YURIJ A,SU, LIPATOV VLADIMIR I,SU, PROKUNIN ALEKSANDR N,SU, MEDVEDOVSKAYA FAINA M,SU, LITVINOV ALEKSANDR I,SU, ZADVORNYKH VLADIMIR N,SU

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ROTATING SHAFT SEAL von KONSTANTINOV IGOR L,SU, SHUMILOV VALERIAN P,SU, LEONOV ARKADIJ ,SU, LAGAEV GENRIKH F,SU, BUKHMAN YURIJ A,SU, LIPATOV VLADIMIR ,SU, PROKUNIN ALEKSANDR N,SU, ENTOV VLADIMIR M,SU

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