Helium-4 liquid and gaseous. Density, enthalpy, entropy, isochoric and isobaric heat capacities at temperatures from 2.5 K to 500 K and pressures up to 100 Mpa
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
