4. Hydraulic and earth engineering
  5. Underground passageway, e.g., tunnel
  6. Boring

Hans Bertschinger

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Apparatus and method for tunnel construction with shield drive

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
Patent

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Sewage ventilating basin

Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
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Profile ID: LFUS-PAI-P-130565

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