State system for ensuring the uniformity of measurements. Standard reference data. Toluene, liquid and gaseous. Density, enthalpy, entropy, isochoric and isobaric heat capacities and speed of sound at temperatures from 180 K up to 700 K and pressures up to 100 MPa
Low voltage surge protective devices. Part 21. Surge protective devices connected to telecommunications and signalling networks. Performance requirements and testing methods
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