4. Boring or penetrating the earth
  5. Bit or bit element
  6. With fluid conduit lining or element
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High flow weld-in nozzle sleeve for rock bits

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Reissue Patent

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High flow weld-in nozzle sleeve for rock bits

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent

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High pressure fluid jet cutting and drilling apparatus

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent

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