... 1.Groove drum form 2.frequency conversion start 3.Electron overlap prevention device JW368C Single-face Doubling Winder This ... stable and reliable, is suitable for multispecies;3. Electron decollation detection and the electron fixed length device as one, put an end ... consumption and noise, makes the operation more advantageous; 6. Electron overlap prevention device, to make the molding of bobbin look ...