Materials for printed boards and other interconnecting structures. Part 2-4. Reinforced base materials, clad and unclad. Polyester non-woven/woven fiberglass laminated sheet of defined flammability (vertical burning test), copper-clad
United power system and isolated power systems. Operative-dispatch management. Ensuring coordinated operation of centralized systems of automatic control of frequency and active power flows and automatic management of active power of hydroelectric power stations. Norms and requirements
