{HEAD ~ A data processor} is used for registering {TAIL ~ the time} of the day when the passage is detected, the time of the day when a change of state occurs at each station 
is used for registering
{ HEAD ~ A data processor } is used for registering { TAIL ~ the time } of the day when the passage is detected , the time of the day when a change of state occurs at each station
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL 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