3.Retractile, easy to transport. Application: 1.To reinforce the roadbed of highway/railway. 2.To bear the pressure of dam, retaining wall. 3.To prevent landslide. 4.To support the pipeline and sewer. 5.To be used as independent wall, wharf and breakwater, etc.. 6.To be used for the management of the desert, beach, river bed and river bank.