TY JOUR TI DETERMINATION OF THE ANGLE OF NATURAL SLOPE FOR DIFFERENT FRACTIONS OF SANDY SOIL BY THE UVT-3M DEVICE KW angle of natural slope KW UVT-3M device KW sandy soil KW grain size JO Modern Technologies and Scientific and Technological Progress AU Knyazik, V.A. AU Obmanko, N.S. AU Baranova, A.A. PY 2025 IS 2025 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»