And it is harmful to spin high quality high counts pure rabbit hair worsted yarns . Traditionally the method of single-tout test is used to determine the process parameters in many enterprises which causes waste of plenty of manpower material and time .

传统上许多企业都是采用单啧 试纺的方法来确定 纺纱的工艺参数与成纱的性能值，耗费了大量人力、物力和时间。