This method may be used to attach {HEAD ~ fluid flow} to {TAIL ~ ducted surfaces} bounding the fluid flow 
to
This method may be used to attach { HEAD ~ fluid flow } to { TAIL ~ ducted surfaces } bounding the fluid flow
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH