This machine is constructed with link thread lake up lever,rotating hook with thread,Swinging needle bar and bouble lockstitch.It has characteristics of aesthetic.appearance,flescible operation complete lubrcation,easy maintenance and low voice,This machine is nide ly used in enbroidering or mediumand heavy materials and various materials,e.g.Knitwear,cotton textiles and chemical fabric.Lncluding curve and lockstitch(only neplacing feed dog presser foot and needle plate).