77675089
Feb 20, 2009
non-metal armored or reinforceable polymeric modular panels for use with sand, gravel, concrete or soil, as bunkers, perimeter wall sections, delay barriers, guard shacks, revetments, trenches and side walls, and in connection with the building, stabilization and repair of dikes, retaining walls, retention basins, reservoirs, locks, dams and levies
Nonmetallic Building Materials