The friction damper includes a plate underlying {HEAD ~ radially outer shrouds} of {TAIL ~ two adjacent airfoils}  
The friction damper includes a plate underlying { HEAD ~ radially outer shrouds } of { TAIL ~ two adjacent airfoils }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH