1, the powder having an average particle size of 6 microns Polygonum (3,000 X magnification SEM)
2, aluminum hydroxide powder having an average particle size of 0.7 microns (20,000 times enlarged SEM)
3、Zinc alloy powder having an average particle size of 2.5 microns (SEM enlarged 6000 times)
4、The average particle size of 14 nm silica powder (TEM enlarge 380000 times)
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