Increasing the technological process’ energy efficiency of the of applying multifunctional wear-and-heat-resistant protective coatings by electro-acoustic sprayingAndrei Kochetov, Elena Fisunova, Tatyana Lavrenova and Luybov FilonenkoE3S Web Conf., 279 (2021) 01016DOI: https://doi.org/10.1051/e3sconf/202127901016