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备用电源
reserve source of electrical power
- 我们必须使用备用电源设施。
We have to activate the back-up power supply. - 当冷却装置电源发生故障或电压降低时，应自动投入备用电源。
If the power supply of cooling device is in failure or its voltage decreases, standby power should be put into operation automatically. - 转换开关转换开关是能够把负载在备用电源和常规电源之间进行转换的电气设施。
Transfer Switch A transfer switch is an electrical device for switching loads between alternate power sources.
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中国词汇量第二的英语词典
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