measuring the transfer data at the predetermined transfer position again, for {HEAD ~ a guided vehicle} which needs {TAIL ~ measurement} of the machine difference data again, to newly determine machine difference data to update the transfer data at each of the transfer positions 
needs
measuring the transfer data at the predetermined transfer position again , for { HEAD ~ a guided vehicle } which needs { TAIL ~ measurement } of the machine difference data again , to newly determine machine difference data to update the transfer data at each of the transfer positions
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH