A dual rotors up and down with the two-stage crusher, two sets of rotors in series with each other, so that the material produced by the higher rotor crushing i.e. rapid rotation of the lower rotor hammer again crushing cavity material rapid collision, crushing each other , to hammer powder, powder material effect direct unloading. Second, there is no mesh grate at the end, the humidity of materials, not blocked. The traditional mill with sieve grate, not suited to high moisture content of 8% raw, when raw material with high moisture content 10%, prone to severe congestion, the hammer can not move, the material can not be discharged, even burning bad motor, seriously affecting production. No mesh grate at the end, high-hard material, high humidity is expected to ensure no blockage, feed moisture content up to 100% hydrous fineness of 90% all in 2MM (mm or less) 1MM (mm) accounted for 70% , dry and wet, rainy usual production. The aircraft design does not mesh grate at the end, the moisture content of the material is not strictly required, completely blocking the sieve paste problem does not exist, can not be discharged powder does not exist, repeat crushed, so the high grinding efficiency, there is no hammer Invalid wear and tear. Three, two dual-rotor crushing, production, the particle size of 3 mm or less, 2 mm less than 80%. Four, wear a combination of hammer, high wear-resistant alloy hammer. Hammer hammer handle in combination with a change of the hammer, do not change the hammer handle. Five unique displacement technology transfer gap, hammer wear without repair, mobile location repeated use, a hammer top three hammerhead. Six hydraulic manually start the case, only one person can easily open and close, not only lightweight, fast and safe, reliable, easy to repair.