first storing means for holding written data while {HEAD ~ the power} is being supplied from {TAIL ~ a power source} 
is supplied from
first storing means for holding written data while { HEAD ~ the power } is being supplied from { TAIL ~ a power source }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL