However, not much research on other indexes of spinning yarn quality such as limit count, slubs, and neps were conducted, especially in China.

对其它的成纱品质的质量指标如可纺支数、粗节、棉结等的预测模型研究的比较少，尤其是国内的相关报道就更少。

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Because of the limitation of material forming limit and other factors, it is necessary to produce this kind of parts by multi-pass spinning technology.

由于受到材料成形极限等因素的限制，成形此类回转体零件往往需要采用多道次旋压工艺。

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In recent years, some of the hollow parts with non-circular section can be produced by spinning, which breaks through the limit of spinning only producing hollow parts with circular section.

近年来，一些非圆截面空心零件采用旋压技术进行加工，突破了传统旋压技术的范畴——旋压只能加工轴对称回转体的空心零件。

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