TY JOUR TI PREVENTION OF UNAUTHORIZED DROPPING (DROP) DRAYS AND LABOUR BODY OF CONSTRUCTION MACHINERY KW hydraulic actuator KW hydro-cylinder KW building machinery KW locking and regulating device KW safety buffer stop KW hydraulic inverter JO Bulletin of Bryansk state technical university AU Kuznetsov , A.. AU Sakovich, N.E. AU Khristoforov, E.N. AU Bezzub , Y.. PY 2016 IS 2016 PB Bryansk State Technical University