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