lower chord
短語詞組
- lower -chord panel point [建]下弦節(jié)點
- lower chord length 上弦桿長度
- lower chord member support 下承式
- lower chord panel points 桁架的下弦桿節(jié)點
- lower chord bracing 下弦支撐
- upper and lower chord 上下弦
- roof truss lower chord elevation 屋架下弦標(biāo)高 返回 lower chord