sand filled drainage layer 排水砂垫层
leachate drainage layer 渗滤污水排水层
radial drainage layer 横向排水层
pervious drainage layer 多孔排水层
internal drainage layer 内部排水层
crushed stone drainage layer 碎石排水层
drainage protected layer 排水保护层
Finally choose a asphalt which is fit for drainage layer with macro voids.
最终选出一种适合于高孔隙的排水性面层的高粘沥青。
As landfill site working, biochemical process and seepage of leachate always affect and change drainage layer permeability.
垃圾填埋场运行过程中，渗滤液的渗流和生物化学作用，不断影响和改变着排水层的渗透性能。
As the overall quality and rigidity of the structure with gravel drainage layer increased, the stability of the structure increased.
碎石排水层加大了结构与碎石的整体质量和刚度，增加了结构的稳定性。
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