The device 6, wherein the vertical projection comprises a stem and a top portion, and wherein {HEAD ~ the stem} is slimmer than {TAIL ~ the top portion} 
is slimmer than
The device 6 , wherein the vertical projection comprises a stem and a top portion , and wherein { HEAD ~ the stem } is slimmer than { TAIL ~ the top portion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL