soft soil thickness 软土层厚度
critical top soil thickness 临界表土厚度
Measurement of Bed Soil Thickness 床土厚度检测
thickness of soil 土壤厚度
soil layer thickness 土层厚度 ; 土壤层厚度
Thickness of Planting Soil Layer 种植土层厚度
soil pad thickness 垫层厚度
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The gravel content has more close relation with position and elevation and soil thickness of ground.
含碎石剖面碎石体积含量随土层深度增加有变大的趋势。
Principle component analysis showed hat the elevation and soil thickness can be used as sensitive indices to describe plant change.
主成分分析结果表明，海拔和土壤厚度是指示植被变化的敏感指标；
The seismic force distribution on bridge piers is obtained for various conditions of frozen soil thickness and height of bridge piers.
得到了不同冻土厚度、不同墩高时桥墩地震内力分布的规律。
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