Reciprocating internal combustion engines. Safety requirements for engines, intended for use in potentially explosive atmospheres. Part 3. Group III engines for use in flammable dust atmospheres
Self-defence gas arms. Mechanical sprayers, gas-pressure and other devices with teary or irritating materials. Safety requirements. Types and methods of control during safety certification tests
United power system and isolated power systems. Relay protection and automation. Distance and overcurrent protection of power lines and utilities 330 kV and above. Testing
€25
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