In Tazhong Area, the main factor of impacting average velocity is the depth of stratum and lithology of igneous.
在塔中地区，影响平均速度的主要因素是地层埋深和火成岩的岩性。
The parameters considered in this study were depth of stratum, fine content, D50, depth of water level, plastic index, SPT-N and PGA.
在这项研究中考虑的参量是地层的深度， D50， 水平面的深度， 塑料索引， SPT-N和PGA。
Before application of land sonar to measure the depth of loose stratum, several tests are done to prove that it is feasible.
在全面应用陆地声纳测量之前先做了几组对比试验，确定了它用来测量松弛带厚度的可行性。
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