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

Leonid Multakh

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Impregnated diamond drill bit

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

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Impregnated diamond drill bit construction

Cutting by use of rotating axially moving tool – Tool having crystalline cutting edge
Patent

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Profile ID: LFUS-PAI-P-786747

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