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