Secondary cells and batteries containing alkaline or other non-acid electrolytes. Safety requirements for secondary lithium cells and batteries for use in electrical energy storage systems
United power system and isolated power systems. Relay protection and automatic. Automatic control devices of frequency and active power of hydraulic power units of hydraulic and pumped storage power plants. Norms and requirements
State system for ensuring the uniformity of measurements. The volume of natural gas. Method of error calculations in measurements of natural gas volume at reference conditions. Basic principles
