{TAIL ~ The cover member} has a top surface terminating in longitudinal side wall portions shaped to fit over {HEAD ~ the free edge regions} of the channel member 
{ TAIL ~ The cover member } has a top surface terminating in longitudinal side wall portions shaped to fit over { HEAD ~ the free edge regions } of the channel member
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH