模底接触区与自由变形区交界处的大塑性变形区依次处于板料曲面内双向伸长变形和平面应变状态；
The zone between the region contacted with bottom of the mould and the free forming region shows stretch forming and then transferred to plane strain state.
注意吊索的变形伸长以及吊索固定点位置应不受土体变形的影响。
Pay attention to that the elongation and fixed point position of sling should not affected by the earth body deformation.
通过对开口时经纱变形伸长特性和开口形式的分析，指出了多臂机不能充分发挥效能的问题所在，并给出了解决办法。
Based on the analysis of distortion and protraction of warp and form of shedding, the problem that dobby can not fully develop its capacity is located.
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