| 摘要 |
An apparatus for cutting threads or grooves in a rotating workpiece with a rotating cutting tool, the tool and workpiece rotating in timed relationship, comprising an integer ratio between the revolutions of tool and workpiece and a superimposed rotation of tool or workpiece relative the other, which superimposed rotation is coupled to the feeding motion for tool or workpiece, the tool being arranged for rotation about an axis located outside the contour of the thread to be cut in the workpiece.
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