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

Yoshiyuki Ohara

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Method and machine for constructing shafts

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

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Monofilament and process for producing the same

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate

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Profile ID: LFUS-PAI-P-987919

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