When spinning polyamide filament core-spun yarn covering fibre should be finer, longer and higher uniformity, which could improve yarn evenness and covering effect and guarantee yarn quality.

在纺制锦纶丝包芯纱时，选用的外包纤维细长、长度整齐度高，可以改善成纱条干和包覆效果，保证成纱质量。

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Increasing demands on the yarn properties both in terms of level and uniformity make the factor production speed as a universal remedy for cost reduction lose significance.

随着人们对丝条质量包括级别和均匀性方面的要求不断提高，仅通过控制生产速度来降低生产成本失去了重要意义。

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