GOST R 8.756-2011 State system for ensuring the uniformity of measurements. State verification schedule for measuring instruments the ultrasound velocity in solids
2014GOST R 8.756-2014 State system for ensuring the uniformity of measurements. State verification schedule for means measuring the propagation velocities of longitudinal, shear and surface ultrasonic waves in solids
2011GOST R 8.756-2011 State system for ensuring the uniformity of measurements. State verification schedule for measuring instruments the ultrasound velocity in solids