Summary: Bottom spray technique through creation lap which is opening at the two ends in a hopper, and the corresponding with different opening rate of sieve, to control the movement of materials formed orderly flow of state. Liquid through installation the pneumatic nozzle of sieve center, add to the system, the direction the same as the material move direction. So making coated film thickness for uniform and continuity, this is a very important factor in controlled-release making infusion. Spray droplets flying short distance, less coated solvent consumption. Application: Granules coating/ enteric coating/ controlled-release coating