Ventilation and Oxygen Supply - Manure composting is an important factor in the lack of air and oxygen. Self Sealing Sterilization Pouch, Steam Indicator , Sterile Cotton Gauze Swabs , Green Crepe Paper ,Steam Sterilization Indicator . Bio-fertilizer making machine The product will supply to all over the world, such as Europe, America, Australia,Durban, Guinea,Liverpool, Atlanta.The cage crusher is a professional crushing equipment for hard materials such as urea, monoammonium, diammonium, etc. It can crush various single fertilizers with a water content below 6%, especially for materials with high hardness. It has simple and compact structure, small footprint, convenient maintenance, good crushing effect and stable operation.