1. Classical automatic function improve the sewing efficiency, such as auto trimming, auto back tacking and pneumatic presser foot lifting. 

2. It adopts horizontal large hook, and can sew max threads of 9 strands nylon. 

3. Classical automatic function improve the sewing efficiency, such as auto trimming, auto back tacking and pneumatic presser foot lifting. 

4. Adjusting alternating amount of presser foot instantanceously DL function can climb over thick spots in highly efficiency. 

5. Three parts compound feeding construction can make sure feed smoothly and difficult to move for upper and lower material.

6. Application: abutted seam and topstitch process for sofa, tent, summer sleeping mat.