Which of the following tasks does the work of data center operation and maintenance include? (multiple choice)
When the outdoor temperature will be lower than () ℃, the outdoor unit of the air-cooled air conditioner needs to be equipped with low temperature components. ()
The root standard stipulates that the voltage drop of the AC cable should be controlled within 3%. It is recommended that the voltage drop of the AC cable should be controlled within ( ) when designing the UPS system.
Huawei air-cooled air conditioners (25kw and 42kw) one indoor unit corresponds to one outdoor unit
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