Molecular formula :
nature : small and round refer to the material. The simplest particle shape of a ball. Size 40 ~ 500 µ m, solid density difference in 1400 between the ~ 4000kg/m3 said coarse particles (coarse particle); The particle size of 20 ~ 100 µ m, the density difference between solid particles smaller than 1400kg/m3 said fine particles (diminutive particle); Many particle size between 000 little separated the tablets particles constitute a system of particles said particles (particle swarm).
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