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"Our internet-connected devices use a proprietary radio system, which links the alarms together," says Nick Rutter, co-founder and chief executive of FireAngel. The connected alarms can send push notifications to users' phones via their home internet router.
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电影《伊万的童年》(1962)
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Despite the physical and emotional demands of the job, McKenzie says nothing beats the incredible experiences he's had - as well as the satisfaction of contributing to environmental research.