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Drill slide for rock drilling apparatus
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System for logging formations surrounding a borehole
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Flexible cable for underground mining purposes
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Process for acid fracturing of underground formations
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Extraction machine for underground mining
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Method for underground mining of minerals using rock mechanical mining
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Method of interconnecting subterranean boreholes
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Method of construction for underground structure
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Method for the reduction of stresses in the undisturbed soil at abandoned workings during underground exploitation of useful minerals
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Method for the reduction of stresses in the undisturbed soil at abandoned workings during underground exploitation of useful minerals
ZA200901456B
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Underground mining apparatus
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2003-08-25
Mining railway for underground mines
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2006-08-07
Method for mining useful mineral and backfilling pillar workings in deep mines
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Method for the control of operating pressure at the front of exploitation of useful minerals in underground mines