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