It adopts a new type of cloth feeding mechanism with upper and lower feeding teeth, which operate independently; Through the combination of enlarged differential ratio and superior cloth feeding performance.It can eliminate the misalignment phenomenon that occurs during sewing; It is easy to combine different fabrics Together, difficult oper-ations such as zigzag hemming become simple and easy.It is widely used in the lap seam and decorative seam of various fabrics such as clothing, underwear, bedding, thin packaging and leatherproducts.