4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element

Eishiro Miida

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Composite nozzle for earth boring and bore enlarging bits

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Pressure tight joint for a large diameter casing

Pipe joints or couplings – Particular interface – Tapered
Patent

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Profile ID: LFUS-PAI-P-358557

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