Jisho

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車軸
Wikipedia definition
1. Axle counterAn axle counter is a device on a railway that detects the passing of a train in lieu of the more common track circuit. A counting head (or 'detection point') is installed at each end of the section, and as each axle passes the head at the start of the section, a counter increments. A detection point comprises two independent sensors, therefore the device can detect the direction of a train by the order in which the sensors are passed.
Read “Axle counter” on English Wikipedia
Read “車軸カウンタ” on Japanese Wikipedia
Read “Axle counter” on DBpedia

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