DEVICE FOR ABRASIVE WORKING OF INNER SURFACES OF WORKPIECES von PETKOV GEORGI KOSTOV,BG, STOEV STAMEN NEDELCHEV,BG, MINCHEV STEFAN PENEV,BG, PETROV YAKIM NAJDENOV,BG, BOTEV BOTO PENCHEV,BG, METEV GEORGI METEV,BG, RADEV NIKOLAJ IVANOV,BG, NAJDENOV IVAN KHRISTOV,BG

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FURNACE-LADLE von SAVOV PETR KHRISTOV,BG, KAMALOV ALEKSANDR R,SU, SKACHKOV OLEG A,SU, DONETS ANDREJ I,SU, DRAKALIJSKI BORIS JORDANOV,BG, MINCHEV DIMITR STANCHEV,BG, SHAKHNOVICH VALERIJ V,SU, BERSHITSKIJ IGOR M,SU, BAKALOV NIKOLAJ GEORGIEV,BG, OKOROKOV GEORGIJ N,SU, SINELNIKOV VYACHESLAV A,SU, KATS YAKOV L,SU, ATANASOV OGNYAN ATANASOV,BG, KHRISTOV KHRISTO GENCHEV,BG, PENEV PENO IVANOV,BG, BAGAROV STEFAN TODOROV,BG

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