结果表明，气动V形牵伸机构在生产中适合大牵伸工艺，粗纱定量加重，成纱质量较弹簧摇架加压好。
The result shows that pneumatic V type draft mechanism is suitable for large draft technology in production, and if weighing roving quantum, yarn quality is better than pressure of spring cradle.
牵伸装置采用螺旋弹簧加压的摇架，压力稳定可靠，操作方便。
The drafting roller weighting by spring pendulum arm reliable and easy to operate.
牵伸装置采用螺旋弹簧加压的摇架，压力稳定可靠，操作方便。
The drafting roller weighting by spring pendulum arm reliable and easy to operate.
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