{TAIL ~ Retention channel} 915 extends substantially the entire length along each edge of each part receiving {HEAD ~ area} 910 
{ TAIL ~ Retention channel } 915 extends substantially the entire length along each edge of each part receiving { HEAD ~ area } 910
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH