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Application filed by Di Leo GiuseppefiledCriticalDi Leo Giuseppe
Priority to IT8105601ApriorityCriticalpatent/IT8105601A0/en
Publication of IT8105601A0publicationCriticalpatent/IT8105601A0/en
IT8105601A1981-02-171981-02-17
TRUNK-CONICAL FILTERING CYLINDERS TO BE APPLIED TO THE NOSTRILS TO PROTECT THE RESPIRATORY TRACTS FROM POLLUTED AIR
IT8105601A0
(en)