4. Hydraulic and earth engineering
  5. Underground passageway, e.g., tunnel
  6. Lining
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Cast concrete element for underground tubular structure

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

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Collapsible tunnel liner section and method of lining a tunnel

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

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Collapsible tunnel liner section and method of lining a tunnel

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

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Construction of tunnels or pipes for use in civil engineering wo

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

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Continuous gallery construction, in particular for underground m

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

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Continuous method of realization of works underground,...

Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Lining
Reexamination Certificate

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Corner area for tubbing seals

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

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Corrugated structural panels

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

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