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PL295699A1
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Method of and lining for constructing mining equalizing tank funnels, especially while performing renovation of such equalizing tanks
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PL247811A1
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Method of providing sectionalized thermal insulation and sectionalized increase in heat conduction of boreholes and means therefor
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PL247218A1
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Method of lining dog heading crossing and lining frame for protecting crossings of dog headings
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PL247210A1
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Method of ventilating dog headings and sound-absorbing shield therefor
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PL247207A1
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Apparatus for ventilating mine workings
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PL247211A1
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Method of bending steel tubes
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PL247208A1
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System of venttube fans for ventilation of dog headings
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PL247209A1
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Method of rebuilding dog headings
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PL246551A1
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Method of reducing aerodynamical resistance of a ventilation duct
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PL246119A2
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Method of analysing and eliminating hazardous condition in the case of impossibility of sealing the space above tubbings and tubbing stopper therefor
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PL244821A1
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Compressor operation control and monitoring system
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PL244000A1
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Noise reducing method and screen
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PL244003A1
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Sprinkler
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PL244001A1
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Method of boring swellable rocks of substantial humidityand apparatus therefor
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PL243999A1
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Method of filling and sealing workings in mines and apparatus therefor
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PL244002A1
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Filter for providing patency of dewatering borehole
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PL244007A1
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Apparatus for jointing roof members of a lining at crossings of workings
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PL244006A1
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Platform for assembling linings and electromechanical equipment in mines
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PL244008A1
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Air oiler
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PL244009A1
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Steel arching for mines
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