4. Hydraulic and earth engineering
  5. Earth treatment or control
  6. Rock or earth bolt or anchor

Warren Thomas Lay

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Percussive drill with adjustable flow control

Tool driving or impacting – Drive controlled by relative axial movement of tool – Drive motor controlled
Reexamination Certificate

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Rockbolt assembly

Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2510270

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