《天工开物·上篇·乃服》
绫罗的经线每次牵出三十丈，或每五六十丈穿一次筘，这样可以减少穿接的重复劳动。
凡绫罗必三十丈、五立十丈一穿，以省穿接繁苦。
Thirty zhang of warp yarn were drawn out each time for ling and luo, and the rod was threaded once every fifty or sixty zhang, reducing the amount of weaving and connecting.