4. Boring or penetrating the earth
  5. With means movable relative to tool below ground to stop...

Jiri Zastresek

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Coring tubular and method for reducing contamination and...

Boring or penetrating the earth – Processes – Sampling of earth formations
Reexamination Certificate

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Coring tubular and method for reducing contamination and...

Boring or penetrating the earth – Processes – Sampling of earth formations
Reexamination Certificate

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Self-contained closure mechanism for a core barrel inner tube as

Boring or penetrating the earth – With means movable relative to tool below ground to stop...
Patent

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Profile ID: LFUS-PAI-P-1963488

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