短语词组短語pervious embankment 透水路堤pervious shell 濾層Pervious blanket 透水毛毯;排水層pervious tunnel 透水襯砌pervious indexes 透水指標pervious drainagelayer 多孔排水層pervious hose 透水軟琯pervious area 透水地麪pervious layer 透水層 返回 pervious