The rigid frame, low noise, low vibration, operator can not easily fatigue.Improved thread clamping system, even though the start of sewing without slowing down can also prevent the generation of fabric off-line,due to a shortened tangent rear sewing more than, can effectively prevent the sewing appeared at the beginning of the bird's nest shaped stitch, improves electric power,frorn550w to 750w,thick material sewing can be easily completed.Mens I Womens can be used, denim, knitted fabric, women' s underwear in a variety of different uses.