Informational ensuring of equipment and operational activity. System «man-information». Formalized iconic graphic information for carrying out human-information interactions of linguo-semanticized activities
State system for ensuring the uniformity of measurements. Standard reference data. Orthohydrogen, liquid and gaseous. Density, enthalpy, entropy, isochoric, isobaric heat capacities and speed of sound at temperatures from 15 K up to 1000 K and pressures up to 100 MPa