Alternatively, or in addition, {TAIL ~ the storage medium} may be provided with repeaters or other amplifying means which compensate for {HEAD ~ any propagation losses} 
Alternatively , or in addition , { TAIL ~ the storage medium } may be provided with repeaters or other amplifying means which compensate for { HEAD ~ any propagation losses }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD