Friction generated between an outer surface of the plate and undersides of the adjacent shrouds reduces {HEAD ~ undesirable vibrations} in {TAIL ~ the airfoils}  
in
Friction generated between an outer surface of the plate and undersides of the adjacent shrouds reduces { HEAD ~ undesirable vibrations } in { TAIL ~ the airfoils }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH