cad system

基本解释

Additionally, the many complex features of a 3D parametric CAD system are supported by the PDM system available from the same developer.
况且，3D参数化CAD系统中诸多复杂的功能通常都被由相同一群人开发的PDM系统所支持。
When it comes to 2D/3D, questions become more complicated – type of data, CAD system, purpose of share, precision, etc. – this is only a short list of questions.
当共享对象是2D和3D信息时，问题就变得更加棘手了，要考虑到数据类型、CAD系统、共享的目的、精确程度等等，不一而足。
However, as soon as functional requirements are going beyond simple CAD file management or going beyond support of a single CAD system / environment, the implementation becomes crappy.
不过，一旦功能需求超出了简单CAD文件的管理或单一CAD系统/环境的范围，那么实施就变得相当麻烦。

Students in the program learn to use computer-aided-drafting (CAD) to design a photovoltaic system, they learn about the sorts of issues that come up when designing such a system, and they learn about the installation and maintenance of such systems.
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