METHOD OF PROCESSING WASTE CALCIUM SULFATE von DEDOV A.S.,SU, SHISHKANOV A.P.,SU, GOLDINOV A.L.,SU, ANISIMOV YU.S.,SU, ZEMLENUKHIN S.N.,SU, YURINA A.I.,SU, ABRAMOV O.B.,SU

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METHOD OF PRODUCING ROUND TUBES WITH HELICAL RIBS von GOLOVINOV M.F.,SU, STAROSTIN YU.S.,SU, IVANOV V.P.,SU, EROKHOV V.K.,SU, KROTKOV V.N.,SU, PLOKHOV V.I.,SU, AYUPOV R.N.,SU, ANISIMOV A.V.,SU

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