{TAIL ~ A reinforcing agent} is placed between {HEAD ~ each} of the barbs of the connector  
{ TAIL ~ A reinforcing agent } is placed between { HEAD ~ each } of the barbs of the connector
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH