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