Xuejiao Sun, Xiaofei Feng, Baochang Liu, Jianqi Zou, Xuanyi Xiao. Research on the Retrofit of Spatial Roof Based on Fixed Support and Connection Technology of a Metal Roof System. converter [Internet]. 2021Sep.1 [cited 2024May4];2021(7):394-401. Available from: https://converter-magazine.info/index.php/converter/article/view/511