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

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Reversible power takeoff driven post hole digger

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Rock drill

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Rock drill

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Rock drill with conveying groove

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Rock drilling tool with improved conveying

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Rotary gad for ground drill

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0
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