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Application filed by Politechnika WarszawskafiledCriticalPolitechnika Warszawska
Priority to PL25228085ApriorityCriticalpatent/PL146433B1/en
Publication of PL252280A1publicationCriticalpatent/PL252280A1/en
Publication of PL146433B1publicationCriticalpatent/PL146433B1/en
PL25228085A1985-03-071985-03-07Method of detecting sonic waves reflected or coming in particular from ground strata and system therefor
PL146433B1
(en)