State system for ensuring the uniformity of measurements. Standard reference data. Liquid and gaseous n-butane. Thermodynamic properties, dynamic viscosity and thermal conductivity at temperatures from 135 К up to 600 K and pressures up to 70 Mpa
Safety of power transformers, power supplies, reactors and similar products. Part 2-12. Particular requirements and tests for constant voltage transformers and power supply units for constant voltage
