Equipped with a wireless sensor, it activates a pink light attached to another sensor installed on a metal bar next to special priority seats, usually at the end of subway cars.
该设备配有一个无线传感器，与另一个装在特殊专座(通常在地铁车厢的两头)金属把手上的传感器相连，能够发出粉色的光。
Equipped with a wireless sensor, it activates a pink light attached to another sensor installed on a metal bar next to special priority seats, usually at the end of subway cars.
该设备配有一个无线传感器，与另一个装在特殊专座(通常在地铁车厢的两头)金属把手上的传感器相连，能够发出粉色的光。
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