备用控制面板。它的按钮、显示灯和操作杆都更少，但同样能够进行主要的操作。
The reserve control panel. It has fewer buttons, lights and levers, but it is still able to make the main operations.
以往经常用自备柴油发电机组、蓄电池、干电池和镍镉电池应急灯作为应急备用电源。
Traditionally, diesel oil-based generators, storage battery, dry battery and emergency lighting equipped Ni-Cd battery are always used as standby emergency power supply.
法律规定必须随车携带备用的前照灯灯泡。
碳电极、碳刷、灯碳棒、电池碳棒及电气设备用的其他石墨或碳精制品，不论是否带金属。
Carbon electrodes, carbon brushes, lamp carbons, battery carbons and other articles of graphite or other carbon, with or without metal, of a kind used for electrical purposes.
我打算在我的车上至少备用两到三台这样的工作灯。
I try to keep at least two or three in my truck at all times.
我打算在我的车上至少备用两到三台这样的工作灯。
I try to keep at least two or three in my truck at all times.
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