Decrease of material particle size enhanced in-vitro protein digestibility of powder feed without conditioning.
物料粒度减小，能提高调质前粉状饲料的蛋白质体外消化率。
Testing results show that phosphogypsum material particle size distribution is more concentrated, graded poor, good permeability and high shear strength.
试验结果表明：磷石膏颗粒分布较为集中、级配较差、渗透性能良好且抗剪强度较高。
It is because that the particle size of acetylene black is smaller than that of graphite, it is easy to disperse well among active material.
这是因为乙炔黑的粒度比石墨小，比表面积相对更大，能很好地分散在活性物质之间。
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