a rear cover being mounted on the mount surface of the base and having an outer surface and {HEAD ~ a handgrip} being formed on {TAIL ~ the outer surface} 
formed on
a rear cover being mounted on the mount surface of the base and having an outer surface and { HEAD ~ a handgrip } being formed on { TAIL ~ the outer surface }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL