1.1本规范涵盖了羊毛或马海毛的细度等级分类，这些羊毛或马海毛处于油脂、拉伸、洗涤或冲刷状态，或以梳棉条的形式。 1.2本规范也适用于纺纱材料中的羊毛或马海毛的等级分配，或在羊毛系统（但不包括涉及精梳过程的精纺系统）上进行梳理后加工的产品。 笔记 1-有关羊毛上衣、马海毛上衣和羊驼的细度规格，请参阅规格 D3992 和 D2252 . ====意义和用途====== 这些规范被认为是按等级对羊毛或马海毛进行分类的满意标准，并为接受商业装运提供了依据。 通过目视检查确定等级是一种常见的贸易惯例。如有疑问或争议，应将测量的平均纤维直径和纤维直径标准偏差与相应规范进行比较，作为评分的裁判程序。 本规范不适用于混合批次，即由不同等级的羊毛组成的羊毛或马海毛批次，这些羊毛或马海毛在使用前要分离成更小、更均匀的批次。

1.1 These specifications cover the classification, by fineness grade, of wool or mohair that is in the grease, pulled, washed, or scoured state, or in the form of card sliver. 1.2 These specifications are applicable also to assignment of grade for wool or mohair in spun materials or products processed beyond carding on the woolen system but not on the worsted system which involves a combing process. Note 1—For fineness specifications for wool top, mohair top, and alpaca, refer to Specifications D3992 and D2252 . ====== Significance And Use ====== These specifications are considered satisfactory for classifying wool or mohair by grade and provide a basis for acceptance of commercial shipments. Grade determined by visual examination is a common trade practice. In case of doubt or dispute, comparison of the measured average fiber diameter and fiber diameter standard deviation with the respective specification shall be used as the referee procedure for assigning grade. This specification is not intended for application to mixed lots, that is, lots of wool or mohair consisting of fleeces of different grades that are to be segregated into smaller more homogeneous lots before use.