The reason and of weft bar existed in weaving cloth on shuttle loom is analysed. The ways and measures to take in practice to reduce weft bar are discussed.

文章论述了有梭织机产生横档的原因、减少横档的方法，以及在实际生产中采取的相应措施。

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And verification experiments were implemented. The results indicated that the method is workable and the digitalized grading of the weft bar can be accomplished.

经验证，实验结果表明是有效的，并可进一步实现纬档定级的数字化。

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According to the characteristics of warp knit fabrics, open and close loop models as well as fall-plate and weft insertion models of multi-bar that accords with actual loops were set up.

根据经编织物组织的特点，提出符合实际线圈的经编基本组织的开口和闭口模型以及多梳经编织物的压纱和衬纬模型。

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