本文通过对喷气引纬过程中气流对纬纱作用力的分析，建立了纬纱运动的微分方程。
Through an analysis of the forces acting on a weft which is inserted by air-jet in a loom, a differential equation of weft flying movement is estabilislied.
最后，举例阐述了纬纱在打纬过程中，在织口处往复运动的经过。
Finally, an example is given to illustrate pick movement at cloth-fell during multiple beat-up operations.
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