Add appropriate structure to the middle presser avoiding needle jumping as well as the trouble to chang presser during sewing different kinds of patterns.
Add appropriate structure to the middle presser avoiding needle jumping as well as the trouble to chang presser during sewing different kinds of patterns.
合理增加中压脚机构，在缝制中不会出现跳针现象，减少在缝制各种花型中换压脚的麻烦。