Rauj crusher: Lub ntsiab ua haujlwm ntawm rab rauj crusher yog lub rotor nrog lub rauj (} crushed by the blow, impact, shearing and grinding action of the hammer moving at high speed. In the lower part of the rotor, a sieve plate is arranged, and the particle size smaller than the size of the sieve hole in the crushed material is discharged through the sieve plate, and the coarse particle size larger than the sieve hole size is retained on the sieve plate and continues to be hit and ground by the hammer, and finally tawm ntawm lub tshuab los ntawm sab cib phaj .