lockstitch sewing machine:It is a flat-bed style machine,it adopts link take-up and rotating hook to form stitch 301,and can sew very heavy material with neat and beautiful stitches,low noise,easy
mainenance ,and minimum differnce in stitch length between forward and reverse feed with top and and bottomfeed system and foot alterating lift.
lockstitch sewing machine:HEAVY DUTY TOP AND BOTTON FEED LOCKSTITCH SEWING MACHINE