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RU1789024C
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Method for mining gently dipping coal seams
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RU1797666C
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Unit of pneumohydraulic unyielding powered support
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RU1788253C
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Method for erection of temporary mobile roofing from level pillar in mining mineral deposits
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RU1788259C
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Method for mining thick steep fire-hazardous coal seams
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RU1788258C
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Method for mining flat coal seams
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RU1788257C
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Method for mining anticline thick coal seam
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RU1788232C
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Braking gear for coal continuous miner with chainless motion system
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RU1788276C
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Flexible metal roofing and method for its erection
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RU1788277C
|
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Roadway support unit
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RU1796770C
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Flexible roofing
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RU1787545C
|
|
Apparatus for concentrating coal
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RU1784560C
|
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Device for caving bridged loose materials in hoppers
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SU1788291A1
|
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Mine working stone duster
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RU1789721C
|
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Stull anchor
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RU1796029C
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Shield support for thick inclined and steep seams
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SU1751335A1
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Method of preparing for mining thick steep seams
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SU1765407A1
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Method of forming ceiling of mounting chamber during mining of thick steeply dipping seams by horizontal layers
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RU1795112C
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Powered support unit
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SU1752959A1
|
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Method of making flexible canopy when mining thick coal seam in layers
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RU1798322C
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Method of suspension clarification
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