State system for ensuring the uniformity of measurements. Certified reference materials of gas mixtures with Hydrogen, Nitrogen, Oxygen, Carbon Oxide, Carbon Dioxide, Methane, Propane, Hexane. Procedure of determining the metrological characteristics
State system for ensuring the uniformity of measurements. State special standard and state verification schedule for measuring exposure dose, mean exposure rate, mean energy fluence and mean density of pulsed X-ray radiation fluence energy
