churn drill

churn drill

churn drill Examples noun

  1. a portable drill rig using a bit fashioned on a massive steel cylinder that is alternately lifted and dropped to drill a hole in earth and rock.

Examples from the Web for churn drill Historical Examples of churn drill

  • This is a mechanical method and one form of apparatus employed is of the churn-drill type common throughout oil and coal regions.

    The Business of Mining

    Arthur J. Hoskin

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