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This standard contains specific requirements for the construction and testing of electrical apparatus with type of protection flameproof enclosure “d”, intended for use in Class I, Zone 1 explosive gas atmospheres.
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Enterprise-Control System Integration - Part 5: Business-to-Manufacturing Transactionsstandard by The International Society of Automation, 12/03/2018
Mechanical Integrity of Safety Instrumented Systems (SIS)standard by The International Society of Automation,
Book by The International Society of Automation, 01/01/2006