this thesis treats of the two plans of the hot gas defrosting in the refrigeration system of showcases in super marketsand analyzed the property of energy saving of hot gas defrosting qualitatively
本文论述了超市展柜制冷系统的两种热力除霜方案，并定性地分析了热力除霜的节能特性
以上为机器翻译结果，长、整句建议使用 人工翻译 。