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

Eberhart Unger

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Cross-axis cutting assembly of a selective cutting machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – Cutter shiftable horizontally
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Drive shields for tunnel-driving apparatus

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
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Hydraulic control means for pipe thrust-jacking apparatus

Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – Second path activated in response to pressure or flow in...
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Hydraulic ram

Expansible chamber devices – With releasable stop or latch means to prevent movement of... – Includes interfitting parts engageable at plural positions...
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Method of, and apparatus for, driving and lining tunnels

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
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Profile ID: LFUS-PAI-P-133063

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