aerated sand column 充气砂柱
sand column model 砂柱试验
sand column height 砂柱高度
sand column experiments 土柱模拟实验
Leaching method with sand column 沙柱淋溶法
sand pack column 填砂柱
For serious formation leakage, the working fluid can't carry sand column to ground surface in the process of sand washing.
由于地层漏失严重，作业冲砂施工过程中工作液无法将井筒内的砂柱携出地面。
The sand column, saturated at its lower portion and initially in the condition of hydrostatic equilibrium, is drained at its bottom at constant head.
砂柱下部饱和并处于静水平衡状态，在底部为定水头的条件下进行排水。
Gradation of sand column and sediment concentration of muddy water and water head are remarkably effective factors for the fine grain distribution in sand column.
砂柱的颗粒组成、水含沙量和入渗水头对滞留分布产生显著的影响。
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