列出了三种确定机织物单位长度的线数的方法。第一种方法涉及解剖，适用于所有编织结构，包括单个线不易区分的复杂结构。第二种是横穿线计数器，适用于所有可区分线或图案重复的机织物。第三种是计数镜，适用于每厘米有25条或更多线的织物，其中线或图案重复是可以区分的。

Sets out three techniques for determining the number of threads per unit length in woven fabrics. The first involves dissection, which is suitable for all woven structures, including complicated structures where individual threads are not readily distinguishable. The second involves a traversing thread counter which is suitable for all woven fabrics in which the threads or pattern repeats are distinguishable. The third involves a counting glass which is suitable for fabrics with 25 or more threads per centimetre, where the threads or pattern repeats are distinguishable.