a determination portion to determine whether or not {HEAD ~ print data} identical to the print data received by said print data reception portion is stored in {TAIL ~ said storage device}; and 
is stored in
a determination portion to determine whether or not { HEAD ~ print data } identical to the print data received by said print data reception portion is stored in { TAIL ~ said storage device } ; and
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH