geotextiles can be used: 1 filtration layer of the dykes, 2 river canal, ... granule from passing, it allows the water and the gas pass through freely.SeparationThe isolation of the railway dregs and ... , airport, backfill soil of retaining wall, slope protection, etc in which distributes the earth stress, prevents the side-displacement of ... -10-3K=1.0-9.9 Non-woven geofabric used in road construction