Electrical apparatus for explosive gas atmospheres. Part 18. Construction, tests and marking of type of protection encapsulation 'm' electrical apparatus
State system for ensuring the uniformity of measurements. Standard reference data. Xenon, liquid and gaseous. Density, enthalpy, entropy, isochoric and isobaric heat capacities and speed of sound at temperatures from 162 K to 750 K and pressures up to 100 MPa
