Refinement of the contamination formation mechanism in the pneumatic transporting system of a cotton harvester using a new U-shaped receiving chamberRafik Matchanov, Abdurakhim Yuldashev, Davronbek Kuldoshev and Nargiza DjuraevaE3S Web Conf., 417 (2023) 04001DOI: https://doi.org/10.1051/e3sconf/202341704001