根据工艺设计知识库的开放性要求，提出了一个基于开放式结构的层次化知识库模型。
According to the openness of process planning knowledge base, this paper proposes a hierarchy knowledge base model based on open structure.
根据工艺设计要求，对某加氢装置重沸炉转油线的设计特点进行了讨论，对应力计算的结果进行了汇总。
The article gives a chance to discuss some features in design of reboiler oil return pipeline with respect to process design and a summary of results of stress calculation is made.
涂料的设计和工艺也不同，根据板材的纹理、色泽、结构和使用对象不同。
Coating design and process are also different, according to the plate texture, color, structure and use of different targets.
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