{HEAD ~ A supply} of {TAIL ~ material} connected to the deposition means sends pressurized material thereto 
{ HEAD ~ A supply } of { TAIL ~ material } connected to the deposition means sends pressurized material thereto
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH