定重制，是指一定重量的纤维或纱线所具有的长度。其数值越大，表示纱线越细。其计量单位包括公制支数（Nm）和英制支数（Ne）。我国毛纺及毛型化纤纯纺、混纺纱线的粗细仍有部分沿用公制支数表示。
酒店客房中的豪华睡床舒适且独具匠心，镶嵌有珍珠的床头更彰显宾客的尊贵身份。每个房间配有400纱支数的被单及枕套，为您营造舒适放松的睡眠环境。
Inlaid Mother of Pearl headboards, symbolic of good fortune, are located at the head of the luxurious designer beds with their 400 thread-count bed linen providing the ultimate in style and comfort.
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。
However, not much research on other indexes of spinning yarn quality such as limit count, slubs, and neps were conducted, especially in China.
粗梳毛纱的支数是以每磅中300码绞纱的个数来表示的。而精梳毛纱的支数是以每磅中560码绞纱的个数来表示的。
Woolen yarn is measured by the number of 300 - yard Hanks per pound, whereas worsted yarn is measured by the number of 560 - yard Hanks to the pound.
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