TY JOUR TI ONE OF THE REASONS FOR THE FAILURE OF SLEWING DEVICES OF SELF-PROPELLED JIB CRANES MANUFACTURED BY LIEBHERR KW wear KW slewing device KW crane KW character KW wear KW failure KW empirical dependencies JO Transport engineering AU Sladkova, L.A. AU Fokin, V.V. AU Voronin, N.N. PY 2024 IS 2024 PB Bryansk State Technical University