... design 1.Steady Structure of ring die biomass pellet machine with CE and low price :Raw material: Straw, Saw dust, rice husk, seed ... materials.2.Steady Structure of ring die biomass pellet machine with CE and low price Production Process:1, Crushing the raw material into ... alloy steel to be very strong and malleable. Die is made of stainless steel. ring die wood pellet machine with CE and low price