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