This chip, together with its paper label, makes up the RFID tag.
这个芯片和纸质标签构成RFID标记。
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A far simpler kind of chip called a radio-frequency identification (RFID) tag, which sends a tiny quantity of data over a short range when activated, can already be manufactured for 4 cents apiece.
If a special tag-reader is waved near the arm, a radio signal prompts the chip to transmit an identification number which is used to call up information about the wearer in a computer database.