Up to now, the engineering technology, material craftwork, vacuum and auto-control technologies required for building the ETT have been mature.

自提出设想以来几十年过去了，建设ETT所需的工程技术、材料工艺、真空技术和自动控制技术等均已成熟。

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This paper introduces some key technologies of automotive body, auto-shape and quick-design system, including parametric vehicle body, control structure of vehicle assembly, knowledge database, etc.

介绍了汽车车身自动设计和快速成形的计算机辅助设计系统的几个关键技术：汽车车身参数化，汽车车身装配的控制结构，设计专家知识库等。

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