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

Leonid M. Bobylev

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Apparatus for making holes in soil

Boring or penetrating the earth – Boring without earth removal
Patent

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Hydropneumatic percussive tool

Tool driving or impacting – Impacting devices – Impact transmitting anvil
Patent

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Hydropneumatic percussive tool

Tool driving or impacting – Impacting devices – Impact transmitting anvil
Patent

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Method of making holes in the soil and apparatus for performing

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Patent

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Profile ID: LFUS-PAI-P-253465

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