A tray may also be removably secured in {TAIL ~ the channels} of {HEAD ~ the display board extrusions} in selected removably secured positions 
A tray may also be removably secured in { TAIL ~ the channels } of { HEAD ~ the display board extrusions } in selected removably secured positions
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH