APPARATUS FOR AUTOMATIC ELECTRIC ARC WELDING OF BUTT CONNECTIONS von SHCHELKUNOV GEORGIJ M,SU, BUDKINA GALINA YA,SU, DARZNEK YURIJ V,SU, FISHBEJN NOJ B,SU, KOCHERGIN ALEKSEJ K,SU, GENDELMAN GRIGORIJ I,SU, BERDYSHEVA TATYANA V,SU

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