Electrical apparatus for the detection and measurement of flammable gases. Part 2. Performance requirements for group I apparatus indicating a volume fraction up to 5% methane in air
Grounding conductors and grounding devices for special purposes. Extended flexible anode grounding of installations of cathodic protection against corrosion of underground metal structures. General specifications
Electronics automated design systems. Information support. Technical characteristics of electronic components. Resistors and capacitors. Declarative knowledge specifications according to technical characteristics
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