4. Mining or in situ disintegration of hard material
  5. Hard material disintegrating machines
  6. With material-handling means

Leonid A. Mitin

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Apparatus for drifting openings in hard rock

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With material-handling means
Patent

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Hammer for breaking strong abrasive materials

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Percussive-type cutter
Patent

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Percussive device

Motors: expansible chamber type – Relatively movable working members with one having motive... – One working member forms movable chamber for another
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Profile ID: LFUS-PAI-P-1369698

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