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Terms for subject Telecommunications containing 使用 线 | all forms
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不需领执照即可使用的无线电频谱unlicensed wireless spectrum
不需领执照即可使用的无线电频谱unlicensed radio spectrum
手机通话时使用扬声器或有线耳机,并使手机尽量与身体保持距离,能有效减少辐射Using your cell phone's speaker or connecting a wired headset - while keeping the handset away from your body - drastically reduces radio frequency exposure
线路停止使用信号line-out-of service signal