No other passenger jet in modern history had disappeared so completely — without a Mayday call or a witness or even a trace on radar.
因为，现代历史上还没有哪架客机像法航447航班一样消失如此彻底----没有求救信号，没有目击者，甚至没有在雷达上留下任何痕迹。
The airborne SAR (Synthesis Aperture Radar) USES a stabilized platform to make the antenna stable in the inertial place and trace the velocity to the ground.
机载合成孔径雷达使用陀螺稳定平台使天线在惯性空间保持稳定并跟踪地速方向。
The trace association is a key technology in data fusion of netted radar system.
航迹关联是组网雷达系统数据融合中的一项关键技术。
Chemical and Pharmaceutical Manufacturing; Repurification loops for cooling UHF transmitting tubes, radar tubes, and lazer systems; Trace metals analysis.
用于化学和医药生产；再净化循环系统用以冷却超高频发射管、镭射管和激光设备；也可用于微量金属分析。
Chemical and Pharmaceutical Manufacturing; Repurification loops for cooling UHF transmitting tubes, radar tubes, and lazer systems; Trace metals analysis.
用于化学和医药生产；再净化循环系统用以冷却超高频发射管、镭射管和激光设备；也可用于微量金属分析。
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