... 2.frequency conversion start 3.Electron overlap prevention device JW368C Single-face Doubling Winder This machine mainly used to the ... of cotton, acrylic, chemical fiber and blending.Characteristics:1. The single yarn combination of kinds of short spun, microfiber; 2. Groove ... to make the molding of bobbin look elegant;7. Adopts single motor drive, collective frequency control of motor speed, to make ...