... product to have the functioning of back-filtration, water drainage and protection, it is the most popular drainage geomaterial at ... , PH resistant, long life timeconvenient for construction, time-saving and low cost of engineering ItemDLF800/2DLF1000/2DLF1300/2DLF1600/2Remarktensile strength ... .productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); composite Drainage net,2D and 3D