4. Boring or penetrating the earth
  5. Processes
  6. Boring curved or redirected bores

Yukishige Yamada

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Propelling apparatus for underground propelling construction wor

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent

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Underground propelling method

Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent

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Profile ID: LFUS-PAI-P-1384062

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