绳

The hydraulic conductivities of the sand columns containing smectite decrease more obviously than others containing kaoline and illite, whose decreasing extent is about 50% of the former's.

各种粘土矿物中，蒙脱石导致含水介质渗透系数的下降最为明显，高岭土和伊利石约是其影响值的一半。

In the process of research, the properties of drilling engineering were combined with modern technology, and the research methods of guided missile were used for reference.

在研究过程中，本文注重将钻井工程的特点与当今的高新技术相结合，并借鉴了导弹运行轨迹制导技术中的一些研究方法。