4. Boring or penetrating the earth
  5. Processes
  6. Sampling of earth formations

Johann van Es

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Apparatus for directional coring

Boring or penetrating the earth – Tool shaft advanced relative to guide insertable in... – Tool telescopes over guide having surface set at angle in hole
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Method for directional coring

Boring or penetrating the earth – Processes – Sampling of earth formations
Patent

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Profile ID: LFUS-PAI-P-836917

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