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