20S" means, 20 British single yarn, British count indicates the thickness of the yarn, which is the imperial unit of fixed weight, that is, 1 pound of yarn, as many as 840 yards in length, it is called as many British yarns. "/ "Represents the division sign, which is equivalent to the fractional line, "20S" is the numerator, and "2X3" is the denominator. "2X3" is represented as follows, the former refers to the number of single yarns twisted once, and the latter refers to the number of threads twisted twice. Usually we call the finished product of single yarn twisted as thread, the finished product of double twisted yarn as rope, and the finished product of triple twisted rope as cable.