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pump drills


Identification code: 300024688
Español: taladros de bomba | Català: trepant de bomba



Alternative term/s

  • drill, pump
  • drills, pump
  • pump drill

Anotations

Scope note:

Primitive drills in which the shaft is revolved by working up and down a bar carrying a cord attached at the center to the upper end of the shaft.

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