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Application filed by B P Wodnych MelioracjifiledCriticalB P Wodnych Melioracji
Priority to PL19906477ApriorityCriticalpatent/PL199064A1/pl
Publication of PL199064A1publicationCriticalpatent/PL199064A1/pl
PL19906477A1977-06-211977-06-21Sposob zabezpieczania rurociagow drenarskich przed zazelazianiem i rurki drenarskie do stosowania tego sposobu
PL199064A1
(pl)