The configurations of vegetable fibers that exist widely in the nature have many advantages: great length-diameter ratio, high specific strength, large specific area etc.
前言： 自然界广泛存在的植物纤维的形态具有长径比大， 比强度高， 比表面积大等优点。
The comminution type and technical conditions can have great impact on the length-diameter ratio of the product in preparing ultrafine needle-shaped wollastonite powder.
采用不同的粉碎方式及工艺条件制备硅灰石超细针状粉，对产物的粒度及长径比有重要的影响。
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