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手机更新换代的速度不断加快,过时的手机真的没用了吗?能否充分利用这些淘汰的手机,发挥新的作用?利用旧手机能实现遥控密码锁的功能,在异地控制家门的开关。
Mobile phone replacement speed continues to accelerate out of date mobile phone is really useless? Can take full advantage of these out of the cell phone, to play a new role? The use of the old cell phone remote control password lock function, remote control of the door switch.