基于系统设计内容与步骤的分析，有助于结合实际问题进行PLC控制系统的设计。
The analysis based on the systematic design content and steps is helpful to combine the design of PLC system with the actuality.
同时，在规划策略的指导下，结合实际问题提出了相应的更新措施，以期在实践层面具有指导性。
Meanwhile, under the guidance of the planning strategy, combined with the practical issues the corresponding update measures to level with the guidance in practice.
本文结合实际问题，给出了利用《应力应变公式》中的等厚平圆板公式对受压环板应力的理论计算方法。
Combining practical matters, a method of the stress calculation of circular ring plates under press loading using flat circular plates formula was introduced.
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