This system consists of gas sensors, infrared sensor, televox body sensor, door magnetic switch components.

该系统由煤气传感器，人体红外传感器，声控传感器，门磁开关等部分组成。

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Council members go door-to-door, distributing special magnetic emergency cards to refugee and immigrant homes.

VOA: standard.2010.07.22

That said, the rotating magnetic aluminum door that reveals the SD card and SIM slots is slick -- far easier to open and close than the plastic port covers found on most other slates.

ENGADGET: ZTE shows off new V98 Windows 8 slate, we go hands-on