... .HUIDA SZLH400Livestock feed pellet machine of the first rank 2.Adopts variable frequency control ... in light of customer's requirements ,so as to achieve the best technical and economic benefits.SZLH400 Livestock ... feed pellet mill of the first rank is the main machine for producing pellet feed ... operation and reliable run.Dies of various hole diameters such as φ2, φ3,φ4, φ4.5, φ5, φ6, ...