gravel filter 砾石过滤器
sand gravel filter 砂砾过滤机
silica gravel filter 硅砾过滤器
filled gravel filter 填砾过滤器
cylindrical gravel filter 筒式卵石过滤器
sand and gravel filter 砂砾石过滤器
non-filled gravel filter 非填砾过滤器
gravel bed filter 砾石滤床过滤器 ; 颗粒层除尘器
gravel-pasted filter 贴砾过滤器
gravel packed filter 卵石填料滤池
Hexi Reservoir Project, applying filter design, is introduced, which is made up of clay central core and sandy gravel dam according to the gradation curve of clay and gravel.
介绍了合溪水库工程的概况，选用坝型为粘土心墙砂砾石坝，根据粘土和砂砾石料场的颗分曲线，对反滤料进行了设计。
In drainage of agricultural lands, a filter or gravel envelope is used to prevent the entrance of fine sand and silt into the drains.
在农田排水中常常采用砾石或过滤层来防止粉细砂和泥沙进入排水沟。
After reviewing a few design methods of sand gravel filters, a new design method of filter using broad graded materials is proposed in the paper.
本文在回顾了滤层保砂性设计的几种方法后，提出了广级配砂砾滤层保砂性的设计计算式。
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