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Application filed by Jastrzebska Sp Weglowa Sa KopafiledCriticalJastrzebska Sp Weglowa Sa Kopa
Priority to PL32468298ApriorityCriticalpatent/PL324682A1/en
Publication of PL324682A1publicationCriticalpatent/PL324682A1/en
PL32468298A1998-02-041998-02-04Apparatus for identifying a place where miners working in underground parts of a mine are currently present
PL324682A1
(en)