To particularize the implementation of the concurrent process planning systems, and put forward the functional requirements and architecture of product manufacturability evaluation.

详细说明了并 行工艺设计系统的实现方法，提出了产品性的功能要及其体系。

Based on practical example,the authors of this paper particularize the method how to deal with the crevice and give some suggestions to prevent it.

工程实例,详细说明了预应力管桩缺陷部分的加固机理和加固方法,并从施工角度给出了理的预防裂缝出现的建议。