During such engagement, a high degree of friction is created between the fingers and the transverse wires with which they are engaged, thus assuring {TAIL ~ a secure connection} between {HEAD ~ the mats} of successive lifts of the wall 
During such engagement , a high degree of friction is created between the fingers and the transverse wires with which they are engaged , thus assuring { TAIL ~ a secure connection } between { HEAD ~ the mats } of successive lifts of the wall
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH