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RU1789722C
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Device for roof bolting
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Shaft equipment connecting joint
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Benching bit
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Support placer
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Device for separation of drilling mud and plugging-back solution in hole
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SU1761962A1
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Device for measuring anchor fastening strength
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Metal support
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Concrete mix
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Mine shaft bunton
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Drilling device
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Plugging-back slurry
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Laboratory test stand for activation of mortar and concrete by an electrical-hydraulic method
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Transfer bin
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Plugging-back compound
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Disk roller-cutter for drilling hole shoulders
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Method for production of steel-fiber concrete
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Device for erection of roof-bolting
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Yielding support of mine workings
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Method for drilling large-diameter holes and relevant device
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SU1726758A1
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Device for making drain ditch
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