Optimization of the design and technological parameters of an active ripper of a combined working bodyS. A. Ivanaisky, M. A. Kanaev, Y. A. Kirov, M. S. Ivanaisky and S. V. DenisovBIO Web Conf., 37 (2021) 00068DOI: https://doi.org/10.1051/bioconf/20213700068