By the mass-weighted average, the distribution function of volume, area and diameter for graphite particle were obtained.
通过质量加权平均，给出了石墨粉尘的体积、面积和直径分布函数。
Objective to study the total length, total volume, total surface area and average diameter of the capillaries in rat white matter and cortex.
目的观察大鼠大脑白质、皮质内毛细血管总长度、总体积、总表面积和平均直径。
The surface area and micro-pore volume decreased as the oxidation degree becoming more serious, while the average pore diameter increased.
随着氧化程度的加深，活性炭的比表面积、微孔体积都减小，平均孔径增加。
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