... steel,Hardness more than 52 The new product FD series “double vertical ring-die pellet mill”, Research,Design,Produced by ourselves ... gearbox,Driving with high-precision gears,Auto-matic Lubricant pump system keep the gearbox working stability and warranty periodVertical ... time,Working manner is from inside to outside press,Centrifugal force and extrusion pressure together,Produced more capacity,At ...