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PL276420A1
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Method for making the drilling holes in mine faces and a hydraulic device for drilling
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PL275307A2
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Device and method for withdrawing side wall arches of corridor gate housing,especially with upheaved floor
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PL275010A1
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Packing brattice for longwalls with self-advancing roof supports
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PL274889A1
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Method of and resilent members for damping kinetic and acousting energy of conveyed materials
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PL274456A1
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Method of closing abandoned workings, postexploitation voids and mine headings filled with fine-crushed material
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PL274363A1
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Angular scraper conveyor
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PL274361A1
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Mine galery supports
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PL274335A1
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Method of supporting roofs of longwall mine workings,in particular those of short unitary advancement distance and variable length
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PL273898A1
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Light-weight self-advancing roof supports
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PL273838A1
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Apparatus for assembling self-advancing roof supports
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PL273814A1
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Lorry unloading method and system
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PL273774A1
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Method of and apparatus for coupling together adjacent sections
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PL273015A1
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Method of and apparatus for cleaning expansion gaps in buildings
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PL272961A1
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Method of filling underground voids in particular abandoned mine workings
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PL272387A1
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Method of heading protection against transfer of coal dust explosion
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PL272371A1
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Signalling device for transport means on the move
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PL272187A1
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The mechanized lining for walls with hydraulic filling
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PL271556A1
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Method of reducing dustiness of air in mine workings and apparatus for neutralization of respirable fraction of such dust
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PL270886A1
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Method of and apparatus for reducing dustiness of air in dog headings
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PL270397A1
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Sideward build-up platforms for belt conveyors adapted to convey persons on their upper runs
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