6063铝合金建筑型材
aluminium architectural profile
6063铝合金建筑型材基材
6063aluminum alloy architectural base profiles
大型建筑结构
large-scale building structure
大中型建筑机械
large and medium construction machinery
地下大型建筑
Underground Big-space Building
典型建筑形体
typical architectural shape
国有大中型建筑企业
state-owned large and medium construction enterprise