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PL291602A2
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Method of placing flying dusts in voids of mined out underground mine working caving rubble
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PL289685A1
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Apparatus for hydraulically cleaning mining cars
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PL286231A2
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Apparatus for crushing large coal lumps
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PL285875A2
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Method for protecting a wall gallery behing lining movement
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PL162025B1
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System of controlling the belt conveyor adopted for people transport in two direction
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PL248997A1
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Quick-connecting lock-type pipe joint for filling pipelines
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PL248985A1
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Method of filling mined out cavities with dusts,in particular with smoke-box dusts
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PL247672A1
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Method of and filling pipeline for transport of filling from flue dusts,especially smoke-box dusts to operative extraction galleries
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PL244163A1
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Method floor mining method and roof support prop used for carrying out this method
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PL238765A1
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Method of manufacture of granulated insulating aggregate
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PL238492A1
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Method of manufacture of insulating firebrick
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PL238360A1
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Apparatus for guiding a rope to a windlass drum
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PL238281A1
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Method of manufacture of building insulating materials
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PL238280A1
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Method of manufacture of building ceramic ware
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PL236304A1
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Apparatus for tilting railway cars in particular mine wagons
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PL235158A1
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Mine wagon in particular for carrying sections of mine lining
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DE2711528A1
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DEVICE FOR CONTINUOUS DRAINAGE IN THE HYDROMECHANICAL AND MECHANICAL PROCESSING OF FLOCKED SLURES
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