4. Handling: hand and hoist-line implements
  5. Hook, hoistline, or grab type
  6. Locking device

Stahl- und Apparatebau Hans Leffer GmbH

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Elevator for casing

Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Locking device
Patent

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Method and apparatus for sinking a cased borehole for producing

Boring or penetrating the earth – With below-ground tool drive prime mover – With below-ground feed means
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Rotary boring head

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Pivoted about substantially longitudinal axis
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