采用上下送布牙各自独立运作的新型送布机构，通过加大的差动比和优越的送布性能组合，可消除缝制当中易产生的的错位现象，可以很容易的将不同的面料结合在一起，使取折、滚边等难操作工序变得简单易行。

Adopt new top and bottom feed dog independently system. By the combination of increasing the differential ratio and superior feeding, it can eliminate the dislocation along the generation of sewing. It's very easy to combine different shell fabric, and make some difficult operation such as folding, binding simple and feasible.