Function：With the compound feeding of feed-dog,pressure-foot,needlebar,connecting-rod take-up,and large hook,stitches 301 can be achieved.The feeding ability has been enhanced because of the mechanism of connecting-rod feeding,pressure-foot feeding, needle-bar feeding.The elegant sitches can be achieved even several layers being sewn together.Suitable for sewing leather products,sportswear,automobile's cushion,nylon and sailcloth materials.