网格圈是目前国内外应用最为广泛的集聚纺纱装置的重要元件，对成纱质量起关键作用，网格圈的制作有很高的要求。

Lattice apron, an important component of compact spinning system, is widely used in the world. Because of its key effect on the yarn forming, qualified lattice aprons are in demand.

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以四元件模型为基础，利用玻尔兹曼叠加原理建立了纱线应力松弛变化过程的理论方程，并分别对彩棉喷气涡流纺及环锭纺纱线进行松弛实验。

Based on the four-element model, the equation of the stress relaxation process is developed using the principle of Boltgation superposition in this paper.

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