A new residential building is being constructed with visible cranes and scaffolding against a blue sky during the day.图片
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A new residential building is being constructed with visible cranes and scaffolding against a blue sky during the day.
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体系结构城市工作安全钻孔材料天际线项目城市发展机械系统住房工程级别规划梁外部现场起重机现代基础设施砖结构劳动者设计脚手架施工搅拌机建筑劳动力总成工具混凝土框架操作日光进度块住宅

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