The parallelism adjusting means configured for rotationally moving at least one of the first print head and the third print head relative to the second print head so as to adjust {HEAD ~ parallelism} between the first nozzle line, the second nozzle line, and {TAIL ~ the third nozzle line} 
between
The parallelism adjusting means configured for rotationally moving at least one of the first print head and the third print head relative to the second print head so as to adjust { HEAD ~ parallelism } between the first nozzle line , the second nozzle line , and { TAIL ~ the third nozzle line }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL