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