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DE1053445B
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Rotary rock drilling machine with a drive motor that drives and feeds the drill bit
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DE1022996B
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Method and device for regulating the blown air supply to blower systems
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DE970253C
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Process for the extraction of coal in the longwall
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DE690002C
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Jackhammer, especially for mining operations
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DE693764C
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Device for rendering rock drilling dust harmless
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DE705092C
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Device for rendering harmless dust that arises when drilling in rock
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DE693763C
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Device for rendering the rock dust produced during drilling harmless
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DE684284C
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Device for rendering rock drilling dust harmless
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DE659481C
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Driving wedge for mining coal
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DE604268C
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Feed device for conveyor wagons in mine sections
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DE648310C
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Device for rendering rock drilling dust harmless
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