TY JOUR TI DETERMINING THE TECHNICAL CONDITION OF PISTON MACHINES BASED ON THE RESULTS OF MEASURING THE ANGULAR SPEED OF THE SHAFT KW Piston machine KW acceleration KW encoder. JO Modern Technologies and Scientific and Technological Progress AU El'hutov, S.N. AU Lavrik, A.A. PY 2022 IS 2021 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»