Filtering materials in the form of very fine powders exhibit greater surface area than coarser granules.
细微粉末状的过滤材料的表面积比粗糙颗粒的表面积大得多。
Thus, a smaller polymer particle size enables a wider range of filtering materials that can be used with it.
因此，更小的聚合物颗粒大小使能可以使用与它的各种各样过滤的材料。
The traditional filtering materials and equipments can not meet the requirement of water flooding in the later period of oilfields?
随着我国油田相继进入开发后期，传统的滤料及设备过滤精度已不能满足注水的要求。
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