The definition of trimmed surface is main content of Initial Graphics Exchange Specification(IGES). The format of trimmed surface description in IGES file is discussed in detail.
裁剪曲面是基本图形交换规范（IGES）的主要内容，详细介绍了IGES文件中裁剪曲面的定义格式。
This paper offers a detailed introduction of the Generalized Multi-List (GML), a data structure defined in the project "the Implementation of Initial Graphics Exchange Specification".
本文介绍了“基本图形交挟规范IGES的实现”这一“七五”项目中所定义的数据结构——广义多重表（GML）。
This paper offers a detailed introduction of the Generalized Multi-List (GML), a data structure defined in the project "the Implementation of Initial Graphics Exchange Specification".
本文介绍了“基本图形交挟规范IGES的实现”这一“七五”项目中所定义的数据结构——广义多重表（GML）。
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