每个测试都起到质量反馈回路的作用，给那些想修改产品代码的人创建了一个安全保护网，以及一份可以执行的文档。
Each test will serve as a quality feedback loop, creating both a safety net and an executable form of documentation for anyone who wants to change the production code.
分析影响复杂控制回路安全的因素，并阐述如何利用软件功能来实现对复杂控制回路的安全保护。
Analyzes the factors influencing the safety of complex control loop, and elaborates how to utilize software function to achieve safety protection of the complex control loop.
主要原因是锅炉安全阀二次保护回路设计有缺陷，再加上安全阀起跳和回座的整定值与运行额定值相重叠造成的。
The main reasons were due to the defect in the design of safety valve secondary circuit and the overlap of the service rating and the setting for safety valve popping and reseating.
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