Series high-speed stretch sewing machines is suitable for siwing knitted under wear,sports shirts and trousers,elastic tape of skirts etc,suchas collar edge and sleeve-cuffetc.this series machine can from basic stitch and covering stitch,on the above-mentioned basic stitches,through derivation it can al so be used as speclal Sewing machine to sew nylon zippers and scallops,this machine adopts co-mplete-closed auto lubrication system,main drive adops timinbelt to assure high Speed and less noise,the concerned farts are through speclal treatment,to improve its wear-resistance capacity