Feature relation graph is designed to completely describe the relationship among design features and machining features.

特征相关图完整地描述了设计特征之间、制造特征之间及设计特征与制造特征之间的相关关系。

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Design and manufacture technologies based on features are introduced. Extraction technology of machining features from design features is studied.

阐述基于特征的设计和制造技术，以及设计特征向加工特征的转换技术。

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The types and features of Titanium alloys are pointed out and the machining features of BT20Titanium alloys are also analyzed and discussed in this paper.

分析了钛合金的类型与特性，并结合BT20钛合金对其切削加工性进行了探讨。

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