porous layer 多孔层 ; 疏松层
porous-layer open-tubular column 多孔层空心柱
micro-porous layer 组成的微孔层
porous layer open tubular column 多孔层开口管柱 ; 多孔开口管柱
porous layer open tubular 多孔层开管柱 ; 多孔层开口柱
porous layer bead 多孔层珠
porous layer support 多孔层载体
porous layer glass beads 多孔层玻璃珠
As a result of fluvial scouring and aggrading the riverbed, the alluvial layer is fluid-saturated porous medium.
由于河流冲刷和河床加积，沉积层多饱和多孔。
One is on top of the upper non-porous layer, the other is between the two non-porous layers.
一个在上面那个不渗透层的上部，另一个在两个不渗透层之间。
Rainwater flows down to the non-porous layer of rock, and then it flows sideways to where the river cuts through the rock layers.
雨水向下流，流到不渗透岩石层，接着，向旁边流到河流穿过岩石层的那个地方。
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