For example, a hard metal may be used to prevent {TAIL ~ the damage} caused by {HEAD ~ the shock} 
For example , a hard metal may be used to prevent { TAIL ~ the damage } caused by { HEAD ~ the shock }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD