| 摘要 |
A unit for machining a contoured bore or other surface on a workpiece, and including a rotary power driven head having a cutter carrying slide which is movable transversely of the axis of rotation of the head by a powered mechanism under the control of a stylus following a contoured template, with feedback of the motion of the slide to the stylus being effected through feedback means having a portion turning with the head.
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