gravel bed filter 砾石滤床过滤器 ; 颗粒层除尘器
gravel bed 砾石层
clay-gravel bed 粘土砾石
gravel bed load 卵石推移质
gravel bed-load 沙卵石推移质
large gravel bed 大砾石层
gravel bed water 砾石层水
gravel-bed rivers 卵石河流
A new device was designed to study root biomass and distribution in the subsurface flow gravel-bed constructed wetland.
设计了一种新方法研究潜流人工湿地植物根系的分布和生物量。
The prospector panned off bits of sand and gravel scooped from the bed of a stream.
探矿者淘选从河床中挖出的少量含金泥砂和沙砾。
The water is infiltrating the gravel bed.
水正渗透进碎石底层。
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