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