Horizontal surface 45 is envisioned to be such structure as the ground, a floor of a house, a drive way, a table, or {HEAD ~ any suitable surface} which is larger in {TAIL ~ extent} than the tray and which may be found at the work site 
Horizontal surface 45 is envisioned to be such structure as the ground , a floor of a house , a drive way , a table , or { HEAD ~ any suitable surface } which is larger in { TAIL ~ extent } than the tray and which may be found at the work site
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH