METHOD OF AND DEVICE FOR EXPANDING LARGE DIAMETER PIPES von BORODAJ VASILIJ IVANOVICH, BOROVIKOV ALEKSEJ VIKTOROVICH, ZAVIDOV SERAFIM VASIL'EVICH, TYRTOV S.A, SKOROPADSKIJ NIKOLAJ VLADIMIROVICH, CHICHIKALO EVGENIJ ALEKSEEVICH, BRONFEN I.I

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