1. 屋架：roof system 屋盖(3) | roof truss 屋架(4) | rot 腐朽(71)
2. 屋顶架：roof 屋顶 | roof truss 屋顶架 | room temperature 室温
3. 屋架,人字桁架：roof trellis ==> 屋顶花架 | roof truss ==> 屋架,人字桁架 | roof type ==> 屋顶类型
4. 屋顶桁架：Window sill 窗台 | ROOF TRUSS 屋顶桁架 | Side post 边柱
1. While the roof truss design is complex, manufacturing them is not once the design is complete.