该系统利用推理对航空继电器检测和替换顺序进行了优化，节约费用约50％。
This system optimizes the test and replacement sequence of the aviation relay by using reasoning, and the costs are reduced by as much as 50%.
本文以常见的继电器顺序控制电路为例，重点分析了在设计有触点的电器控制线路及实际应用中，常常忽视的临界竞争问题。
Based on usual circuit, this paper analyzed the critical competition in the design of electric appliance control of circuit with contact.
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