The data recorder allows security personnel to input incident codes on site with a built-in keypad and display.

该数据记录器可让安全人员利用内置键盘和显示器现场输入事件代码。

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The system includes the hand-held data recorder, which allows security personnel to input incident codes on site, using the built-in keypad and display.

系统本身配置了便携式数据记录器，通过使用内置数字按键键盘和显示屏，极大地方便了安防工作人员在现场输入事故编码。

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Speaking about the January 7 fire in Boston, Hersman said the plane's flight data recorder showed the battery underwent an unexplained drop in voltage from 32 volts to 28 immediately before the incident, as the plane was being serviced on the tarmac.

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