Environmentally friendly refrigerant R410A Refrigeration performance is better than non-refrigerant R22 better.
The following ____________ is not the basic function of low-voltage circuit breakers.
Climbing personnel must be equipped with necessary safety belts that meet the safety requirements, and use them correctly and reasonably according to the use regulations, while being supervised.
R410A The moment the refrigerant is sprayed to the outside, it can freeze human skin and deep muscles in a very short time, and cause skin necrosis at the frostbite site.
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