... after merger, twist, stable twist in a certain pressure Ultrasonic Cotton Yarn humidifier Functions and featuresProcessing time: Two hours /each yarn ... finalize, spandex coated yarns, cotton, rayon, polyester fiber theory, computer floss silk, sewing thread, knitting line, lace yarn, zip thread, etc. Increase yarn ... start-up, with sealed performance.Web:www.sinojm.com Ultrasonic Cotton Yarn humidifier