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PPSN public packet switched network Premises Distribution System (PDS) PDS is the transmission network inside a building or among a group of buildings, for example an office park or a campus. PDS is u
I-MAC isonchronous media access controller IDN integrated digital network IEC International Electrotechnical Commission Impairments Impairments is the (e.g., transmission channel and signal impairment
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当很多成人还在等待苹果的iWatch上市,孩子们已经可以拥有自己的智能手表了。Kidizoom推出一款名为Vtech的儿童智能手表准备抢滩节日玩具市场。 这款儿童智能手表售价60美元,屏幕1.4英寸,可
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