a) a welded wire face mat having {TAIL ~ an upright portion} of {HEAD ~ an extended height} for disposition over a portion of the face of the formation 
a ) a welded wire face mat having { TAIL ~ an upright portion } of { HEAD ~ an extended height } for disposition over a portion of the face of the formation
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH