4. Boring or penetrating the earth
  5. Bit or bit element
  6. Plural separable cutter elements

Ralston L. Hamlin

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Drill bit and steel combination for improved fluid flow

Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements
Patent

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Self-retaining sleeve and bit

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Tooth mounted on helical head portion or head with helical...
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Profile ID: LFUS-PAI-P-1849435

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