PORTAL SYSTEM FOR ELECTRIC ARC WELDING von NACHEV,GEORGI N, KONSTANTINOV,EMIL S, DZHOREV,SVETLOMIR KH, MOSENKIS,JURIJJ G, PARASHKEVOV,CVETAN N, MILEV,MIKHAIL I, BOGDANOVSKIJJ,VALENTIN A, GUDIMA,OLEG N, KHRISTOV,VLADISLAV K, MALICHENKO,EVGENIJJ F, KISILEVSKIJJ,FELIKS N, BEZHANIJJSKI,BOJJKO P, SAFIR,ILJA T, TIMCHENKO,VIKTOR A, TERTYSHNIJJ,VITALIJJ T, SHVYDKIJJ,NIKOLAJJ R, SOTIROV,NIKOLAJJ A, VODENICHAROV,VALENTIN T, STOJANOV,BOGDAN I

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