电源故备用装置

【计】 power down stand by

电源的英语翻译：

electrical source; power source; power supply
【计】 power source; power supply; PS; supply power
【化】 current source; electric source; power source; power supply
supply source

故的英语翻译：

reason; cause; hence; therefore; die; former; old; friend; happening
on purpose

备用装置的英语翻译：

【计】 reserve arrangement; stand-by equipment; stand-by unit
【化】 emergency installation; emergency unit; spare plant