备用行/列 spare row/column
运行备用 operating reserve
平行备用件 parallel redundancy
平行备用 parallel redundancy
备用飞行操纵系统 standby emergency flight control system
综合备用飞行显示 ISFD integrated standby display ; integrated standby flight display ; ISFD
加热设备运行费用 Heating cost
综合备用飞行显示器 ISFD
备用航行灯 reserve navigation light
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