The second part discussed the theoretical knowledge and data models of DGNDBS; studied the feature, work model and main technique of the network database system.

第二部分从理论上讨论了动力大地测量网络数据库系统的基础知识和数据模型，研究了网络数据库系统的特点、工作模式以及主要技术。

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At last, by means of inverse decision making principle, a process route of features and parts are generated on the base of feature based part model.

最后，在所建立的零件特征模型的基础之上，采用逆向决策原则，进行特征工艺路线和零件工艺路线的生成。

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Aiming at constructing the model of the upper part of male body, the feature and constraint based re model reconstruction method is researched in this paper.

本文旨在以建立男性上体模型为目标来研究逆向工程中基于特征和约束的模型重建方法。

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Additional features geared towards providing a fun play experience for LEGO builders include double-tapping a part for component information, and a Map feature that allows users to see exactly which part of the model is being worked on.

ENGADGET: Autodesk partners with Lego to create 3D interactive Mindstorm EV3 instructions