tmr i want go贵州瓮马铁路南北延伸线湘江特大桥的 opened day , but first i want ask , why so many steel? i see video of engineer do work , they use crane lift , it's too much strain on human body 🤯, and what is meaning of "控制性工程"? 🤔
i heard say this bridge have very hard terrain , like canyons , but still they...