This machine is the single-needle lockstitch sewing machine aiming at high-speed sewing.It is the latest designed product;its cloth feeding and line-hock apparatuses have been greatly improved.By adopting the apparatus for the super sewing effect,this machine has the features of high effiency and stable performance.It is suitable for not only the common materials for men ,women and children dress,but also jean cloth,canvas and leather. It is widely used as one of the basic sewing machine .