午夜三级中文字幕_国产精品人成A片一区二区_亚洲 拍偷_成人黄色一区_我真的不是气运之子动漫免费观看_综合91

摘  要  蒸汽壓縮式制冷系統按采用的工質不同，可分為氨制冷系統、氟制冷系統。由于采用的工質不同，制冷系統的特性、
構造及應用范圍亦不同。此文試圖對氨制冷系統與氟制冷系統的異同進行分析比較，以利制冷系統的選擇和決策。
關鍵詞  氨制冷系統  氟制冷系統  選擇和決策
 
COMPARISON    BETWEEN    AMMONIA    REFRIGERATION  
SYSTEM    ANDREFRIGERATION    SYSTEM
Gao xin hua    Gao Yun
 
Abstract   Steam compressed refrigeration system may be divided ammonia refrigeration system and freon
refrigeration system according to used differant refrigerants. Refrigeration system’s property, construction and
application extent are differant because of being used differant refrigerants.This essay tries to compare the difference
between Ammonia refrigeration system and freon refrigeration system to help to select and decide suitable refrigeration
system.
Keyword   Ammonia refrigeration system    Freon refrigeration system  Selection and decision