The base plate 112 and {HEAD ~ the top cover} 114 are large surfaces within {TAIL ~ the disc drive} 100 
The base plate 112 and { HEAD ~ the top cover } 114 are large surfaces within { TAIL ~ the disc drive } 100
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH