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