... , low price1. reinforce the base, efficiently allot and diffuse the pressure, prolong the using time;2. increase the load-bearing capabilities;3 ... , save the cost, prolong the using time, and reduce the servicing;5. reduce the crook and track, delay 3-9 times of the ... . reinforce the carry capacity and prolong the using time of the base;9. avoid the road subside and crack and keep the road orderliness ...