4. Hydraulic and earth engineering
  5. Earth treatment or control
  6. Shoring, bracing, or cave-in prevention

Karl Harhoff

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Material and transfer loading apparatus

Conveyors: power-driven – Conveyor having means specialized for collecting a load from... – Power-driven feed means
Patent

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Shield apparatus for use in tunnelling or mining

Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent

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Profile ID: LFUS-PAI-P-687780

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