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11 天
短距无线技术识别:蓝牙、Wi-Fi、BLE、Zigbee、NFC、RFID、Z-Wave
由于NFC通过两个电磁耦合的线圈进行通信,操作范围仅约一英寸或两英寸。这两个耦合线圈基本上形成了一个空气芯变压器。 06-RFID RFID射频识别技术是一种无接触的自动识别技术,它主要是利用射频信号来进行信息的传递。只要在具体的物品上贴上或者嵌入RFID ...
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Passes Laken Riley Act
Troops to secure border
Nashville school shooting
Soda button reinstalled
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