... sewing machines use.It is applicable for different counts of yarn, such as 40/2, 60/2, 75/2 of ... cotton thread, polyester yarn, high stretch yarn and mercerized yarn. It is equipped with automatic alarm and tension ... thread, decrease thread broken and bobbin deformation.Automatic bobbin winder advantage :1.Automatic bobbin delivery system.2.Automatic bobbin supply checking system.3.Automatic ...