MINE ROOF SUPPORT SECTION GUARD
GENDLER SEMEN G,SU, BAKUSHEV SERGEJ B,SU, LEOSTRIN DMITRIJ F,SU, LOBYNICHEV GEORGIJ V,SU, KOROTKOV YURIJ A,SU, DYADKIN YURIJ D,SU, TIMOFEEVSKIJ LEONID S,SU
Year of Publication 05.10.1978
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Year of Publication 05.10.1978
Patent