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Device and method for augering a conical hole in solid media

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Device for drilling in and/or lining holes in earth

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Device for fixing disk cutter to tunnel excavator

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Downhole drill bit and bit coupling

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Drill

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Drill bit for core boring

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Drill tool

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Drilling apparatus having a radially displaceable reamer

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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