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      3. 智能卡及系統集成解決方案專業提供商。
        您的當前位置: 主頁 > 產品展示 > 智能卡

        產品名稱:通信SIM卡

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        • 產品詳情:
        •         SIM卡是(Subscriber Identity Module 客戶識別模塊)的縮寫,也稱為用戶身份識別卡、智能卡,GSM數字移動電話機必須裝上此卡方能使用。在電腦芯片上存儲了數字移動電話客戶的信息,加密的密鑰以及用戶的電話簿等內容,可供GSM網絡客戶身份進行鑒別,并對客戶通話時的語音信息進行加密。

        99久久ER热在这里只有精品-亚洲欧美中文高清在线专区-正在播放国产真实刚刚发育-欧美特黄一级aa大片
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