STEEPLY SLOPING BELT CONVEYOR
KRYLOV VLADIMIR V,SU, PRISEDSKIJ GEORGIJ V,SU, NEMENMAN LEV M,SU, LEVITSKIJ GRIGORIJ V,SU, KLEJNERMAN JOSIF ,SU, GRIGOREV VLADIMIR K,SU
Year of Publication 05.08.1977
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Year of Publication 05.08.1977
Patent