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
Power line communication apparatus and systems on low-voltage electrical installations in the frequency range 1.6 MHz to 30 MHz. Part 2-1. Residential, commercial and industrial environment. Immunity requirements
Products of fermentation and raw materials for it’s production. Gas chromatographic method for determination of mass concentration of volatile components
