emergency sandbag flood-control sandbag water-preventing sandbag Emergency sandbagflood-control sandbagwater-preventing sandbagSaving time, strength,and money; after ... back-ward, dike leakage, groyne temporarily up-gradestructure of flood-prevent around water course, big drainPreventive preparation of other ... piled up, ease-storage less damage,always ready to use. Emergency sandbag (flood-control)