针对管路敷设约束条件，本文给出基于预处理模型的约束实现。
For pipeline laying constraints, the implement of constraints is proposed based on the pre-processing model in this paper.
针对分支管路敷设问题，本文提出基于流动阻力损失和成本评价的分支管路自动敷设算法。
For pipelines with branches, the automatic laying design algorithms of branch pipelines are proposed respectively considering flow loss and pipelines material cost.
基于混沌栅格预处理模型和管路自动敷设问题的定义，提出管路敷设设计解空间的表达方法。
Based on define of the automatic pipeline laying problem and CGPM, expression method of the solution space of the pipeline laying design is provided.
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