gravel bed

 
       
  • [机] 砂砾层

gravel bed的用法和样例:

例句

  1. The water is infiltrating the gravel bed.
    水正渗透进碎石底层。
  2. A stretch of damaged track ran about 150 yards along the accident site, ties ripped from the gravel bed and the rails twisted.
    损坏的铁轨一直延伸到距事故地点150码远处,沙砾层上的固定结裂开了,铁轨也扭曲了。
  3. In the meanwhile, the result also show that the section configuration and near watercourse characteristic has influenced gravel bed load transport rate.
    河床断面形态及其相邻河道特性对输沙率也有较大的影响。
  4. Biofilm decompose on the surface is the primary removal mechanism.The gravel bed subsurface constructed wetland was used to investigate the removal efficiencies of SS, NH4+-N, BOD5, and PO43-.
    于关渡取用旧贵子坑溪溪水,为接触曝气及地下砾间处理复合式人工湿地,主要之污染去除机制为生物膜对污染质之分解。
  5. Our constant flow gravel bed system grows lettuce about 20% better than a reciprocal flow.Gravel beds and floating rafts are about 15-20% more efficient than NFT.
    我们采用连续流砾石植床种的莴苣的产能比间歇灌溉的系统高出20%25,砾石植床与浮板与NFT高出15-20%25的效率。
  6. The ancient gravel beds in the suburbs of Nanjng is one of the important types of rock of the Cenozoic era.
    南京附近的古砾石层是组成该区新生代地层重要岩石类型之一。

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