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.

youdao

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.

youdao