Design of Toroid-Shaped Solid Ceramic End MillVladimir Grechishnikov, Sergey Grigoriev, Petr Pivkin, Marina Volosova, Alexander Isaev, Dmitry Nikitin and Ilya MininEPJ Web Conf., 224 (2019) 05001DOI: https://doi.org/10.1051/epjconf/201922405001