PL344273A1 - Method fo protecting a system for removing methane from abandoned workings and unmined coal bed at a longwall with caving
- Google Patents
Method fo protecting a system for removing methane from abandoned workings and unmined coal bed at a longwall with caving
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Application filed by Katowicki Holding Weglowy KopafiledCriticalKatowicki Holding Weglowy Kopa
Priority to PL344273ApriorityCriticalpatent/PL193578B1/en
Publication of PL344273A1publicationCriticalpatent/PL344273A1/en
Publication of PL193578B1publicationCriticalpatent/PL193578B1/en