... Drainage, waterproof, breathe freely, protect wet.The advantage of Drain cell1. High compressive strength ,Light weight , fast Drainage , ... of porous, so that can put the water focus drain –pipe nearly .3. Geotextil covers storge board . The egdes ... compressive strength ≥Kpatensile strength ≥N/5cmbreaking elongationVolume ≥cm3/s Puncture strengthSY-PS10HIPS10320//6.40320SY-PS12HDPE/HIPS12300//7.20320SY ...