A plurality of lane boxes are provided for backup of a touch signal and a starting block signal, in case of failure and {HEAD ~ misoperation} of {TAIL ~ the control device} 
of
A plurality of lane boxes are provided for backup of a touch signal and a starting block signal , in case of failure and { HEAD ~ misoperation } of { TAIL ~ the control device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL