4. Boring or penetrating the earth
  5. Boring without earth removal

Mark Randa

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Method for reversing a ground piercing tool

Boring or penetrating the earth – Boring without earth removal
Patent

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Reversible pneumatic ground piercing tool

Tool driving or impacting – Impacting devices – Selective axial direction of impact
Patent

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Profile ID: LFUS-PAI-P-1540704

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