a plurality of nodes having location information to respectively correspond to the starting position and {TAIL ~ the target positions} at which {HEAD ~ the articles} are transported 
a plurality of nodes having location information to respectively correspond to the starting position and { TAIL ~ the target positions } at which { HEAD ~ the articles } are transported
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL