有: 5年 fifteen years通用: be in common use; be current ...电源: source; current source; elec ...的: 4次方是 The fourth power of 2 i ...通用电源: multiple power source; unps universal power supply用电池做电源的: battery operated通用电源接收机: all electric receiver; all-electric receiver; all-electric set; all-electronic单电源的: unisource切断电源的: deenergized自备电源的: self-powered通信用电源设备通用试验方法: general test methods of power supply equipments for telecommunications备用电源: alternate power source; back power; back up power; back-ubattery; backup power source; backup source; backupsupply; emergence power; emergency electric power source; emergency power supply; reserve power source; reserve power supply; reserve source of electrical power; reserve supply; spare power source; stand by power supply; standby power su ly; standby power supply; vlr volt looreserve厂用电源: plant supply; service power; station service supply船用电源: supply飞行用电源: mission supply卫星用电源: power source for satellite通用电报字: conventional telegraph word通用电表: unimeter; universal meter通用电池制: universal battery system通用电导仪: universal conductiuity analyzer通用电动机: general-purpose machine; general-purpose motor; universal motor通用电光镜: panelectroscope通用电话网: general switched telephone network通用电机: general-purpose machine通用电流表: universal ammeter