{HEAD ~ The second member} is removable from the channels by pulling the second member away from the channels to disengage the flanges from {TAIL ~ the channels} 
{ HEAD ~ The second member } is removable from the channels by pulling the second member away from the channels to disengage the flanges from { TAIL ~ the channels }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL