Rods extend through these kinks to secure the upright portions of {HEAD ~ the face mats} against {TAIL ~ separation} from the bent up ends of the soil reinforcing mats 
against
Rods extend through these kinks to secure the upright portions of { HEAD ~ the face mats } against { TAIL ~ separation } from the bent up ends of the soil reinforcing mats
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH