短语词组短語mansard flat roof 複折式平板屋頂mansard d roof 折線形屋頂mansard truss roof 折線形屋頂mansard roof truss 折線形桁架mansard roof construction 折線形屋頂結搆mansard roof with slanted struts 有斜撐的折線形屋頂 返回 mansard roof