Theoretical study of the influence of the length of the spike on the cleaning effect of the fine litter cleanerRuzimurad Rosulov, Anvar Djuraev, Husan Diyorov and Umid BerdimurodovE3S Web Conf., 304 (2021) 03038DOI: https://doi.org/10.1051/e3sconf/202130403038