[电] 后备电源指示灯 backup power: 备份电源backup power source: 备用电源; 后备电源backup reserve power: 后备电源electric power backup: 电源备用设备power indicator: 电源指示器; 功率指示计; 功率指示器; 功率指针下载手机词典可随时随地查词查翻译
