Routine roof covering structure great majority are that the armoured concrete shows the dyadic flat Ao Yu device roof covering.
常规屋面结构大多数为钢筋混凝土现浇或装置式的平屋面。
Routine roof covering structure great majority are that the armoured concrete shows the dyadic flat Ao Yu device roof covering.
常规屋面结构大多数为钢筋混凝土现浇或装置式的平屋面。
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