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
Occupational safety standards system. Protective clothing against liquid and gaseous chemicals, including liquid aerosols and solid particles. Part 1. Performance requirements for ventilated and non-ventilated 'gas-tight' (Type 1) and 'non-gas-tight' (Type 2) chemical protective suits
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