LCO promoter having proper acid sites and stable medium pore distributions by adopting the pore improving method was developed for heavy oil catalytic cracking.
采用添加孔改进剂的方法，开发了具有适当的酸中心分布、稳定的中孔分布的多产柴油重油裂化助剂。
The variation of medium pore diameter and porosity factor is in accordance with that of the pore volume, showing a high permeability of low rank coal reservoirs.
中值孔径、孔隙率的变化特征与孔容一致，预示了低煤级煤储层较高的基岩渗透率。
The issue of elastic wave transmission in anisotropic fluid-filled pore medium is one of difficulties in current petroleum exploration and study of seismology.
含流体孔隙各向异性介质中的弹性波传播问题是目前石油勘探和地震学研究的难点之一。
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