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