Direct yarn number is the mass per unit lengthofyarn; indirect yarn number is the length per unit mass ofyarn.
定长制纱线细度是以纱线单位长度的重量表示的；定重制纱线细度是以纱线单位重量的长度表示的。
2
A winding unit 10 in an automatic winder is configured to wind a predetermined lengthofyarn 20 into a package 30.
自动络纱机的卷绕单元（10）构成为能够将规定长度的纱线卷 绕到卷装（30）上。
3
Thus, we have researched a new type ofyarnlength measurer to solve the problem. It can measure the lengthofyarn accurately during yarn winding to reach the goal of minimizing error and cost.