TY JOUR TI DETERMINATION OF DISPLACEMENT TRAJECTORIES AND FALLING TIME OF HINGEDLY FIXED WORKING UNITS OF AGRICULTURAL MACHINES KW working units KW trajectories of motion KW physical pendulum KW large amplitude oscillations KW oscillation period KW approximately harmonic oscillations. JO Vestnik of Kazan State Agrarian University AU Akimov, A.P. AU Konstantinov, Y.V. AU Mazyarov, V.P. PY 2018 IS 13 PB Kazan state agrarian University