We further describe {TAIL ~ a printing system} capable of laying down {HEAD ~ said materials} in a definite pattern 
We further describe { TAIL ~ a printing system } capable of laying down { HEAD ~ said materials } in a definite pattern
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH