backup radarの例文

例文

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1. The guys in Nashua have had training with backup radar equipment.
2. By 9 : 20 a . m ., backup radar was tracking planes.
3. A backup radar system took over until repairs were made.
4. Evans said the backup radar and air-to-ground communications were restored six minutes after the initial power failure.
5. In October, the backup radar system failed twice while the primary system was down for repairs or maintenance.