| 摘要 |
The application discloses a machine with a motor-driven rotatable work support, separate shaping, grooving and banding tools mounted on doubly pivoted arms for performing operations on a workpiece mounted on the support, and automatic means for controlling the speed of rotation of the work support in accordance with a predetermined pattern coordinated with the shape of work to be formed, and automatic means for controlling the movement of the pivoted arms.
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