4. Hydraulic and earth engineering
  5. Underground passageway, e.g., tunnel
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Process for lining tunnels

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

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Process for making a tunnel and advancing a tunneling read with

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

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Process for the construction of a segment of an open-air...

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

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Process for the protection of galleries

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

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Process for waterproofing surfaces

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

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Process of providing an elongate underground cavity

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

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Profiled seal for tunnel segments

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

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Pumpable mine seal

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

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