| 摘要 |
The thread entry funnel (15) of the thread draw-off nozzle (11) possesses a concentrically arranged annular groove (16, 17, 18, 19) interrupted by at least one radially directed web (20, 21, 22, 23). The limiting faces of the groove extend along the penetration surface of an ellipsoid of revolution, a paraboloid of revolution or a sphere (25). <IMAGE>
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