4. Handling: hand and hoist-line implements
  5. Grapple
  6. Well type

Wirth Maschinen-und Bohrgerate-Fabrik

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Device for connecting a drill column to a pipe or the like

Handling: hand and hoist-line implements – Grapple – Well type
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Method and apparatus for sinking shafts

Boring or penetrating the earth – Processes – Boring with specific fluid
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