METHOD OF UNDERGROUND SEAMS MINING,PREVENTING GAS FLUE FROM OLD WORKINGS,COAL SELF-IGNITION ORIGIN AND COAL SUBSTANCE LOSSES von PAVELEK DUSAN ,CS, PETRAS LUBOMIR DRSC.,CS, EHRENBERGER VLASTIMIL CSC.,CS, KLAPAL MILAN CSC.,CS

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METHOD OF UNDERGROUND SEAMS MINING,PREVENTING GAS FLUE FROM OLD WORKINGS,COAL SELF-IGNITION ORIGIN AND COAL SUBSTANCE LOSSES von PAVELEK DUSAN ,CS, PETRAS LUBOMIR DRSC.,CS, EHRENBERGER VLASTIMIL CSC.,CS, KLAPAL MILAN CSC.,CS

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ZARIZENI KE STAVENI DREVENYCH STOJEK V NIZKEM PORUBU von OTAVA RUDOLF CSC.,CS, GOLA JAROSLAV ,CS, VALNICEK JOSEF CSC.,CS, ZLOCH VACLAV,CS, EHRENBERGER VLASTIMIL CSC.,CS, VOJKOVSKY OLDRICH,CS

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ZARIZENI PRO DOPRAVU A UPINANI DREVENE STOJKY KLINOVOU STROPNICI von GOLA JAROSLAV ,CS, IVAN LUBOMIR ,CS, VALNICEK JOSEF CSC.,CS, EHRENBERGER VLASTIMIL CSC.,CS, SVRCULA MILAN ,CS, KENF MARCEL,CS, BODI JAN ,CS, SMIDAK STEPAN ,CS

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