首先定义尺素和尺素链等概念，并在此基础上建立尺寸公差的尺素表示模型及其语义映射；

Firstly, the concepts of dimensional element (DE) and dimensional element-chain (DEC) are defined, and a geometric tolerancing model expressed by DE and its semantic mapping are also given.

youdao

首先定义尺素和尺素链等概念，并在此基础上建立尺寸公差的尺素表示模型及其语义映射；

Firstly, the concepts of dimensional element (DE) and dimensional element-chain (DEC) are defined, and a geometric tolerancing model expressed by DE and its semantic mapping are also given.

youdao