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person:(murakami, koichi)
TRACK CIRCUIT DEVICE AND TRAIN ON-RAIL DETERMINATION METHOD
SAFETY SUPPORT SYSTEM AND OBSTACLE DETERMINATION METHOD FOR STATION PLATFORM
TRAIN POSITION DETERMINATION DEVICE AND TRAIN POSITION DETERMINATION METHOD
TRAIN POSITION DETERMINATION DEVICE AND TRAIN POSITION DETERMINATION METHOD
RAILROAD WAYSIDE FACILITY MONITORING SYSTEM, INSTRUMENTATION TERMINAL AND CENTRAL DEVICE
ON-ROAD INSTALLED TYPE ROAD SIGN NOTIFYING STATE CHANGE IN ACCORDANCE WITH DANGER EXTENT