exterior walls短语⁶³²⁸⁰ 基本例句 外墙 This paper firstly introduces and analyzes the feasible energy saving retrofitting technologies for envelope of existing office buildings, mainly about exterior walls, windows and roofs. 首先介绍和分析了既有办公建筑围护结构节能改造的适用技术,主要包括外墙、外窗和屋顶的节能改造技术。 dictall