4. Mining or in situ disintegration of hard material
  5. Processes
  6. Stabilizing underground structure
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Equipment for shortwall mining useful for extraction of pillars

Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent

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Equipment useful for winning ores particularly coal in longwall

Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent

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