A shut off is provided in {HEAD ~ the manifold} for preventing skin flow to {TAIL ~ a particular nozzle} during sequential gating 
A shut off is provided in { HEAD ~ the manifold } for preventing skin flow to { TAIL ~ a particular nozzle } during sequential gating
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH