After attachment the clamping means is removed allowing the middle member to expand and exert {HEAD ~ a force} on {TAIL ~ the wire mesh members} 
on
After attachment the clamping means is removed allowing the middle member to expand and exert { HEAD ~ a force } on { TAIL ~ the wire mesh members }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL