In the printing operation, first, {HEAD ~ record data} is received from {TAIL ~ the host computer} 25  
is received from
In the printing operation , first , { HEAD ~ record data } is received from { TAIL ~ the host computer } 25
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH