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A shout or bell to warn that fire has broken out. A device making a loud noise that gives warning of a fire. An alarm that is tripped off by fire or smoke.
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1 3 color cctv video camera w omnivision cmos. 4 channel dvr pci card video security camera cctv.
Motion can be detected by measuring change in speed or vector of an object or objects in the field of view. This can be achieved either by mechanical devices that physically interact with the field or by electronic devices that quantifies and measures changes in the given environment.
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Friday, November 5, 2010. Are television sets that use LCD technology to produce images. LCD televisions are thinner and lighter than CRTs of similar display size, and are available in much larger sizes. This combination of features made LCDs more practical than CRTs. For many roles, and as manufacturing costs fell,their eventual dominance of the television market was all but guaranteed. None of these have entered widespread production.