surface particle density

"Silver dollars" extremely thin particle, slippery surface, high density, strong coverage and similar to metallic effect.

银元状，粒径极细，表面平滑，密度高，遮盖力强，仿似金属效果。

The properties, such as apparent density, specific surface, particle size distribution and activity of mechanical activated fly ash at different grinding time were studied.

研究了机械活化时间对粉煤灰的视密度、比表面积、粒度分布及活性的影响。

"Silver dollars", thin particle size, high density, parallel directional, bright color, slippery surface, strong metallic impression, white and blink.

银圆状，粒径细，高密度，平行线定向，鲜艳清晰，表面光滑，金属感强，白而闪亮。