4. Boring or penetrating the earth
  5. Automatic control
  6. Of boring means including a below-ground drive prime mover

Pertti Koivunen

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Method for controlling a drilling sequence, a rock drilling...

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Reexamination Certificate

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Method of controlling rock drilling

Boring or penetrating the earth – Automatic control – Of boring means including a below-ground drive prime mover
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2064878

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