This is similar to the radio frequency identification (RFID) systems often seen in transit systems such as San Francisco's Clipper swipe card or London's Oyster scheme.
这个系统类似于旧金山路路通卡及伦敦Oyster公交卡采用的射频识别（RFID）系统。
This is similar to the radio frequency identification (RFID) systems often seen in transit systems such as San Francisco's Clipper swipe card or London's Oyster scheme.
这个系统类似于旧金山路路通卡及伦敦Oyster公交卡采用的射频识别（RFID）系统。
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