State system for ensuring the uniformity of measurements. National standard. Standard reference data. Pyezokeramik on the LiaKbNacNbdTamSbnO3+z[Bi2O3–Fe2O3]. Dielectric and piezoelectric properties at a temperature of 25 °C
State system for ensuring the uniformity of measurements. State verification schedule for 1 to 1x 10 minus 3 degree V/m2 degree irradiance. Measuring means within the wavelength range of 1-50 mc
