A portable radio information terminal capable of operating at {HEAD ~ a plurality} of {TAIL ~ phases} to execute different functions 
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A portable radio information terminal capable of operating at { HEAD ~ a plurality } of { TAIL ~ phases } to execute different functions
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH