The oil supplied and returned system is improived already; We can adjust the front/back slant angle of feed dog freely,to reduce the crinkle possibility and the stitch error between up/down feeding material; New style lifting presser foot is very easy and reliable, can debase the malfunction rate greatly,and the operation is very convenient and agile; We can adjust the needle distance for forward and reverse stitch, based on new design, to guarantee to sew forward and reverse stitch smoothly and placidly.
