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Application filed by Yu S Ishchenko, V A Bukarov, V V Roshchin, V A Khavanov, N A FrolovfiledCriticalYu S Ishchenko
Priority to SU782622498ApriorityCriticalpatent/RU1075530C/en
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Publication of RU1075530CpublicationCriticalpatent/RU1075530C/en