例句與造句

1. Structural use of concrete - design charts for singly reinforced beams , doubly reinforced beams and rectangular columns
   混凝土的結(jié)構(gòu)使用.第3部分:單配鋼筋梁雙配鋼筋梁和矩形柱設(shè)計(jì)圖
2. It's difficult to find doubly reinforced beam in a sentence. 用doubly reinforced beam造句挺難的