4. Boring or penetrating the earth
  5. Processes

Yasuo Kotake

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Method and apparatus for supporting the wall of an upwardly exca

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

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Method and apparatus for upwardly cutting full cutting face of a

Boring or penetrating the earth – Processes
Patent

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Profile ID: LFUS-PAI-P-777310

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