Enhancement of Open-Pit Mining Efficiency by Means of Quality Improvement of Open-Pit Excavators Design and Operating In Specified ConditionsPyotr Zykov, Evgeny Zvarych, Andrei Karasev and Dieter WeberE3S Web Conf., 134 (2019) 01006DOI: https://doi.org/10.1051/e3sconf/201913401006