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drill frame

A drill mounting often made at the mine to suit the tunnel requirements. It usually comprises two girders strapped together to form a replica of the tunnel shape but smaller in size. The structure is mounted on wheels and provision is made for clamping the drills to various parts of the frame according to the drill-hole pattern in use. It contains a central opening to allow the passage of the loading machine, cars, or conveyor.

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  • ed.young
  • (Milwaukee, United States)

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