{HEAD ~ A dual master}, formed with a first and a second image, is wrapped round {TAIL ~ the print drum} of the upstream printing section 
is wrapped round
{ HEAD ~ A dual master } , formed with a first and a second image , is wrapped round { TAIL ~ the print drum } of the upstream printing section
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH