METHOD FOR PRODUCING BLANKS OF PARTS OF LOCK USED AT DRILLING WELLS
ROMANTSEV BORIS ALEKSEEVICH, GONCHARUK ALEKSANDR VASIL'EVICH, MARENKOV EVGENIJ ANDRIANOVICH, CHISTOVA ALJA PETROVNA, KHZARDZHJAN ANNA AKOPOVNA, ZAGRAJ LJUDMILA ABDRASHITOVNA, DAEVA EKATERINA VIKTOROVNA
Year of Publication 20.05.2007
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Year of Publication 20.05.2007
Patent