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Application filed by K B Proizv Ob Saratovneftegaz, Saratovskij Polt InstfiledCriticalK B Proizv Ob Saratovneftegaz
Priority to SU874215518ApriorityCriticalpatent/SU1590926A2/en
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Publication of SU1590926A2publicationCriticalpatent/SU1590926A2/en