Development and Application of Triangular Main Transformer On-load Tap Changer Hoisting Equipment for OverhaulSiyuan Zhang, Chengliang Zhu, Feixiang Wen, Shuaijie Niu and Gang ZhouE3S Web Conf., 385 (2023) 02006DOI: https://doi.org/10.1051/e3sconf/202338502006