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Priority to PL16687273ApriorityCriticalpatent/PL97257B1/pl
Publication of PL97257B1publicationCriticalpatent/PL97257B1/pl
PL16687273A1973-11-261973-11-26Sposob wykonywania obudowy szybu w gruntach sypkich lub plastycznych i obudowa szybu do gruntow sypkich lub plastycznych
PL97257B1
(pl)