| 摘要 |
A rotary device for simultaneously treating two or more regions of a workpiece, which includes a rotatable shaft having an externally threaded portion. Mounted on the shaft, connected to the shaft or integrally formed with it, is a first tool. The device further includes a second tool which is mounted on the externally threaded portion of the shaft. The second tool is internally threaded so that rotation of the second tool axially displaces the second tool along the shaft, thereby changing the spacing between the two tools. The device further includes a set screw or similar mechanism for fixing the second tool at a location along said externally threaded portion of said shaft. |
