4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Helix or helically arranged structure

Hermann Hugger

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Apparatus for rock drill

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure
Patent

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Drilling device

Chucks or sockets – Socket type – Lost motion
Patent

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Profile ID: LFUS-PAI-P-806424

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