iron triangle是什么意思

用法例句

In the structure system of triangle rigid frame in combination with arch bridge of non-hinge tie bar adopted in Guangzhou Xinguang Bridge,the triangle rigid frame plays an important rule.

广州市新光大桥采用三角刚架与下承式无铰系杆拱桥相结合的结构体系,其三角刚架具有重要作用。