In the year of 2000 and 2003, International Electrotechnical Commission has published IEC61508 and IEC61511, providing a basis for the research on the functional safety of Safety Instrument System.
2000年和2003年，国际电工组织分别发布了IEC61508和IEC61511标准，为研究安全仪表系统安全功能的可靠性，即功能安全提供了理论基础。
In the year of 2000 and 2003, International Electrotechnical Commission has published IEC61508 and IEC61511, providing a basis for the research on the functional safety of Safety Instrument System.
2000年和2003年，国际电工组织分别发布了IEC61508和IEC61511标准，为研究安全仪表系统安全功能的可靠性，即功能安全提供了理论基础。
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