Part IV:Commonly Used Professional Terms of Civil Engineeringdevelopment organization 建设单位design organization 设计单位construction organization 施工单位reinforced concrete 钢筋混凝土pile 桩steel structure 钢结构aluminium alloy 铝合金masonry 砌体(工程) reinforced 配筋砌体load-bearing 承重砌体 unreinforced 非配筋砌体permissible stress (allowable stress) 容许应力plywood 胶合板retaining wall 挡土墙finish 装修finishing material装修材料ventilation 通风natural 自然通风mechanical 机械通风diaphragm wall (continuous co