Then, {TAIL ~ a predetermined step} of {HEAD ~ copying} is carried out in the electrostatic copying machine 4 
Then , { TAIL ~ a predetermined step } of { HEAD ~ copying } is carried out in the electrostatic copying machine 4
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH