Polymer concrete and fibre concrete as efficient materials for manufacture of gear cases and pumpsKassym Yelemessov, Leonid Krupnik, Sayin Bortebayev, Bauyirzhan Beisenov, Dinara Baskanbayeva and Akzhan IgbayevaE3S Web Conf., 168 (2020) 00018DOI: https://doi.org/10.1051/e3sconf/202016800018