We are the only one own and use the CE certificate legally in Taian City, China;we can provide the original CE certificate and evidences; each of other companiesoffered CE must be a faitour in Taian city, and we will take a legal action onthem.Auto grids are made of macromolecule polymer by the process of being stretched out,formed into lamella, punched regularly and then longitudinal and transverse elongated,which have much higher longitudinal and transverse tensile strength, especiallyin its prophase. These structure can supply a linking system to soil,which be used broadly to enable the permanent bearing capacity of roadbed. Usage: 1,suitable for strengthening road and railway base. Improve loading of roadand railway base, extend usage validity. Prevent surface of road and railway frombreaking. Reduce maintaining charges. Shorten construction time. 2,increaseloading capacity of base. Prevent land soil from sinking; including embankment,slopes, tunnel, airfields, parks, docks and so on. 3,tighten slopes to proof waterand soil from losses. 4, reduce the surface thickness of the ground. 5, preventtunnel from crack occurring. 6, freely construction, save time and cut down thecost of maintenance. producing area:China supplying capacity:large