{TAIL ~ Friction} is generated during operation of {HEAD ~ the engine} between the outer surface of the friction damper and the undersides of two adjacent shrouds 
{ TAIL ~ Friction } is generated during operation of { HEAD ~ the engine } between the outer surface of the friction damper and the undersides of two adjacent shrouds
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH