A printing device includes {TAIL ~ a printing head} having arranged printing elements capable of forming dots on {HEAD ~ a medium} used for printing 
A printing device includes { TAIL ~ a printing head } having arranged printing elements capable of forming dots on { HEAD ~ a medium } used for printing
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH