This makes it possible to suppress {TAIL ~ vibration problems} caused by {HEAD ~ vibration} close to the source 
This makes it possible to suppress { TAIL ~ vibration problems } caused by { HEAD ~ vibration } close to the source
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH