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Application filed by Vaclav NavarafiledCriticalVaclav Navara
Priority to CS669574ApriorityCriticalpatent/CS178653B1/cs
Publication of CS178653B1publicationCriticalpatent/CS178653B1/cs
CS669574A1974-09-301974-09-30Device for pressure equalizing in internal tank towards pressure in external tank,which envelopes internal tank
CS178653B1
(en)