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

Hans G. Follert

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Cutting appliances for use in tunnel driving operations

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

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Tunnel drive shield

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
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Profile ID: LFUS-PAI-P-1436045

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