Engineers superimpose the original CAD models over actual buildings to determine which bits of the model need to be updated, or which parts of the building need to be rebuilt.
工程师们将原始的CAD模型叠印于实际的建筑上，以此来定夺模型的哪个部分需要被改进，或者建筑的哪个部位需要被重建。
Preprocessing of "points cloud" data and surface reconstruction are the critical technology of reverse engineering and are the premises of building product CAD model.
“点云”数据的预处理和曲面重建技术是反求工程的关键技术，是产品CAD模型建立的前提。
Based on geological model of deposits and by means of CAD method, the authors put forward the building method of layered opencast mining geological model, whose layers are composed of bench.
本文提出了在矿床地质模型的基础上，应用CAD技术。建立以台阶为单元的分层式矿床开采地质模型的方法。
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