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