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Abstract of US Patent No. 3315882 Cl. 233-7.05.10.64 to Pennnsalt Chemicals Corp.
Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 1, p. 48, January, 1969.
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Brazhnikova, A.V. Bearing seal for conveyer centrifuges. Chem Petrol Eng 5, 85–86 (1969). https://doi.org/10.1007/BF01136900
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DOI: https://doi.org/10.1007/BF01136900