哪吒机器人提醒：
提醒：Computerworld Blogs - Security
【标题】High tech police gadgets to fight crime
【摘要】high tech police gadgets: warning! you are under surveillance. it may be through peacemaker police surveillance vans parked in your neighborhood, or through "sound dna" or even heartbeat detectors. there are even gadgets that are meant to be deterrents for anti-social individuals; these devices emit sonic blasts that can be heard only by teenagers.read more... (02-16 21:24)
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