Water-cooling/ethylene glycol air-conditioning refrigerant at the factory has been filled well, on-site installation convenient and quick.
Answer(s): A
In air-conditioning systems, the role of (_______________) is to cool the high-temperature and high-pressure gas discharged from the compressor by using water-cooled or air-cooled to release heat to the outside world.
Answer(s): B
In the low-voltage distribution system, the role of the N line is used to exchange working current backflow.
How much V is the contact voltage limit (equivalent to the safety voltage) prescribed by the International Electrotechnical Commission (IEC)? And provides 25V following do not need to consider the safety measures toprevent electric shock.
Answer(s): C
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