On analytical study of heat transfer phenomenon in special-shape soldering iron Xasanboy Qodirov, Xurshida Rajabova, Nurzoda Аbdullajonova, Zamiraxon Otaxonova, Ibratjon Аliev, Sultonali Abdurakhmon and Shavkat Sayitov E3S Web of Conf., 508 (2024) 05006 Published online: 05 April 2024 DOI: 10.1051/e3sconf/202450805006