... , tents, cushions, leather products; 2.Compound feed. Double-needle lockstitch sewing machine Model:SF20606Application:It is suitable for sewing suitcase, tents ... auto-lubricating rotating, and sliding thread taking-up.2.The machine can sew two parallel straight lock stitches. 3.Arm ... Feeding by compound feed mechanism system such as feed dog, needle bar and presser foot, so that even thicker and ...