| http://www.w3.org/ns/prov#value | - The system may be constructed so that each of the room sensor units is a transducer which transmits the signal in series from the central console to each adjoining room or hall; or a plurality of units which are common to one room or area, such as hallway, may be provided, and the signal transmitted into the common hallway or room so that all of the units will transmit the signal into the rooms un
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