The principle of the condenser is to cool the high-pressure gaseous refrigerant to release heat into a liquid state to realize the transfer and release of heat.

The gas fire extinguishing system consists of ____________ .

() is a fire detector that detects smoke particles.

The following ____________ air supply methods mainly use process air conditioners that have a large amount of waste heat to be taken away from the lower working area.

R410a Refrigerants can produce the greenhouse effect and destroy the ozone layer.