For complex structural geology of ATI areas, this research can provide the patterns of body-wave group-velocities and phase-velocities to benefit the theoretical research.
可以针对ati地区的地质情况，给出体波群速度和相速度变化图案，为进一步的理论研究提供便捷。
2
The study of which is helpful to the solution of such theoretical aud practical problem as genesis of loess and its properties engineering geology.
对它的研究有助于解决黄土成因、黄土工程地质性质等有关的理论与生产问题。
3
Tectonostratigraphy is a new branch of stratigraphy. Its theoretical basis is modern stratigraphy, structural geology, tectonics and metamorphic geology.