... Product Description Main products The main product is hi-performance bare spandex yarn,15D,20D,30D,40D,70D,105D,140D,210D ... spining channel,and it eventually fomes the spandex bare yarn.The workers pick spandex bare yarn up and place them in the ... to the Grading Workshop. 5.The different levels of spandex bare yarn can be divided into the different gradesby workers and ...