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