| 摘要 |
Upon receiving a command for writing data to a transponder, a reading unit performs radio communication with the transponder to which data should be written, thereby reading, in non-contact fashion, a data item stored in the transponder. A collating unit collates the data read by the reading unit with a data item to be written to the transponder. A control unit performs radio communication with the transponder, thereby writing the data item to the transponder, when the data items are not identical, and skips the writing of the data item when the data items are identical.
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