| 摘要 |
Machine consists of a carriage moving along horizontal beam and supporting arm, pivoted to the frame and carrying cutter on stop. Beam is provided with a step which fixes the cutter shaft. A reducing motor is mounted on the lower part of the frame to transmit the turning movement to arm. Cut is made in horizontal plane through curved tube at angle alpha to locating arm and situated at the centre of curvature of the axis of symmetry of the tube.
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