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Application filed by Le Gornyj I, Pt B I Vniizhelezobeton, Prokhoro Balandinskoe MramornofiledCriticalLe Gornyj I
Priority to SU721855005ApriorityCriticalpatent/SU689832A1/en
Application grantedgrantedCritical
Publication of SU689832A1publicationCriticalpatent/SU689832A1/en