单项选择题
A.raised B.risen C.reduced D.maintained constant
It should be ensured that only （） vapor is handled by t...
单项选择题It should be ensured that only （） vapor is handled by the refrigeration compressor.
A.humidity B.dry C.steam D.oil
A refrigerant gives up heat when it goes through （）.A.c...
单项选择题A refrigerant gives up heat when it goes through （）.
A.condenser B.regurgitate C.evaporator D.boil coil
A refrigerant boils and vaporizes in the （） in a compre...
单项选择题A refrigerant boils and vaporizes in the （） in a compression refrigeration system.
A.liquid receiver B.compressor C.condenser D.cooling coil
