The gravel, grave cement and concrete thickness are given for reference only; the final thickness will be accurately calculated according to Chinese regulation.
砂砾层，水泥稳定石层，和混凝土层的厚度仅供参考，最终将根据中国规范精确的测算出其各自厚度。
The minimum injection rate of gravel pack increases while increasing the diameter of perforation tune, the perforation density, the perforated thickness and the critical velocity.
射孔密度、射开厚度、孔眼直径及临界流速增加时，砾石充填最小排量也增加。
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。
应用推荐