PL289040A2 - Method of introducing material into a selected space behind the roof supports while mining a bed and material handling apparatus therefor
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Method of introducing material into a selected space behind the roof supports while mining a bed and material handling apparatus therefor
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Application filed by Boleslaw Smialy Kopalnia WeglafiledCriticalBoleslaw Smialy Kopalnia Wegla
Priority to PL28904091ApriorityCriticalpatent/PL164374B1/en
Publication of PL289040A2publicationCriticalpatent/PL289040A2/en
Publication of PL164374B1publicationCriticalpatent/PL164374B1/en
PL28904091A1991-02-111991-02-11Method of introducing material into a selected space behind the roof supports while mining a bed and material handling apparatus therefor
PL164374B1
(en)