TY JOUR TI Calibration of the Automated Ultrasonic Inspection System for SHUTTLE R Hollow Axle’s Wheelsets KW Measuring installation KW calibration KW etalons KW measurement methods KW measurement error JO Bulletin of scientific research results AU Belentsov, Y.A. AU Efimov, V.D. AU Solov'ev, V.S. PY 2025 IS 2025 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"