Up to now there hasn't a special code for the design of rail transit viaduct.
Up to now there hasn't a special code for the design of rail transit viaduct.
目前我国尚无专门的轨道交通高架桥设计规範。
Up to now there hasn't a special code for the design of rail transit viaduct.
目前我国尚无专门的轨道交通高架桥设计规範。