Tray legs 25 extend {HEAD ~ a distance} sufficient to prevent {TAIL ~ clamping assembly} 40 from coming in contact with the arbitrary horizontal surface 45 
sufficient to prevent
Tray legs 25 extend { HEAD ~ a distance } sufficient to prevent { TAIL ~ clamping assembly } 40 from coming in contact with the arbitrary horizontal surface 45
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH