NITROOLYGOMERS AND METHOD FOR THEIR PREPARATION von STEFANOV, ZHELCHO S, BOROVANSKA, MARA G, KARAIVANOVA, MARGARITA S

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VALVE FOR PLATES IN PERFORMING HEAT MASS- EXCHANGE PROCESSES AND DUST COLLECTION von STEFANOV, ZHELCHO S, PASKALEV, GEORGI P, TASEV, ZHIVKO A, KOLEV, NIKOLAJ N

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REACTOR FOR CONTINUOUS MIXING AND SEDIMENTATION von IVANOV,IVAN D, VLAEV,LJUBOMIR T, DAMJANOV,DAMJAN P, STEFANOV,ZHELCHO S

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ELECTROLYTE FOR CADMIUM PLATING von KOSTOV,VALERI K.,BG, STEFANOV,ZHELCHO S.,BG, KARAIVANOVA,MARGARITA S.,BG

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ANTICORROSION ADDITIVE FOR CONSERVATION MIXTURES AND OPERATING CONSERVATION LUBRIFYING MATERIALS AND METHOD FOR ITS MANUFACTURE von MINKOV,DIMITR M, PETKOVA,NEDJALKA B, ATANASOV,ATANAS G, TASEV,ZHIVKO A, ANTONOV,CENKO KH, PETKOV,PETKO S, TASEVA,VANJA L, KORALSKI,GEORGI I, STEFANOV,ZHELCHO S

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Influence of the Marangoni Effect on the Efficiency of Plate Columns for Binary Distillation von Stefanov, Z., Karaivanova, M. K.

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Longitudinal mixing of the liquid phase on a cocurrent valve tray with entrainment separators von Tasev, Z, Stefanov, Zh, Kamenski, D

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