4. Boring or penetrating the earth
  5. Bit or bit element
  6. Impact or percussion type

Mark Clench

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Diamond drag bit

Boring or penetrating the earth – Bit or bit element – Impact or percussion type
Patent

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Matrix diamond drag bit with PCD cylindrical cutters

Metal tools and implements – making – Blank or process – Drill
Patent

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Profile ID: LFUS-PAI-P-1078771

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