1,drainage Net 2,Weight:650g/m2-800g/m2 3,Thichness:4mm-7mm 4,Length:30m/50m 5,Width:1-1.5m Complex drainage net is a new kind of drainage geomaterial, using high density polyethylene HDPE as raw material, it is produced by special extrusion technology. It is a 3-layer structure. The reinforcing strip in the middle has a large rigidity, the vertically arranged reinforcing strip allows the water ...