Electrical apparatus for use in the presence of combustible dust. Part 1. Electrical apparatus protected by enclosures and surface temperature limitation. Section 2. Selection, installation, and maintenance
International Electrotechnical Vocabulary. Electrical and electronic measurements and measuring instruments. Part 311. General terms relating to measurements. Part 312. General terms relating to electrical measurements. Part 313. Types of electrical measuring instruments. Part 314. Specific terms according to the type of instrument
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