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
Electric and optical fibre cables. Test methods for non-metallic materials. Part 509. Mechanical tests. Test for resistance of insulations and sheaths to cracking (heat shock test)
