The tray includes a bottom panel substantially parallel to {HEAD ~ the bottom wall} and a side panel substantially perpendicular to {TAIL ~ the bottom panel} 
substantially perpendicular to
The tray includes a bottom panel substantially parallel to { HEAD ~ the bottom wall } and a side panel substantially perpendicular to { TAIL ~ the bottom panel }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL