We have continuous research and improvement, poured in large sums of investment capital, purchased high production technology from European and American manufacturers, and finally develop the model FDF3. Aside from producing high quality fleece fabric, this model can be transformed into a High Speed Sinker Four-Track Knitting Machine. Because interchanging is easy and also serves many purposes. To the users, this means savings in machine procurement cost. For the producers, its superior performance means long term savings in labor and technical adjustment time.