备用燃料元件束 spare fuel bundle
电子设备用机电元件 Electromechanical components for electronic equipment
电工设备用其他元件 Other components for electrical equipment
电子设备用电机元件 Electromechanical components for electronic equipment
电视类设备用高压元件 High-voltage components for television-type appliances
存在的技术难题还很多，包括将一个防漏电的备用电池集成到心泵内，还有缩小FREE-D电子元件的体积。
Technical challenges remain, including integrating a leakproof backup battery into the device and miniaturising the FREE-D’s control electronics.
您可以使用备用插座，测试不同的分立元件值。
You can use spare sockets to try out different discrete component values.
最后对含hvdc线路的发输电系统进行了充裕度评估，研究了网损、电压及HVDC系统元件备用等因素对交直流系统可靠性指标的影响。
The adequacy estimation of power system with HVDC is investigated, including the effect of network loss and voltage, as well as the component backup of HVDC system on system reliability indices.
应用推荐