Find the centre of the rear apron and mark it. 找到后裙板的中间位置并进行标记。
Regarding the rear curve draft type, the front spacing block and the key elements such as apron combination and low hardness non treatment cots, analysis is done to the mechanism of the above-said elments on the spinning quality. 针对细纱牵伸系统中后区曲线牵伸型式、前区隔距及关键纺纱器材&上胶圈组合元件、中低硬度表面不处理胶辊等因素,分析探讨了其影响成纱质量的机理。