The retention channel extends substantially {TAIL ~ an entire length} along each edge of each part receiving {HEAD ~ area} 
The retention channel extends substantially { TAIL ~ an entire length } along each edge of each part receiving { HEAD ~ area }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD