该文针对虚拟维修操作的特点，提出了一种新的场景图数据结构。

Therefore, an effective scene graph data representation of virtual maintenance training system is presented in this paper.

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在虚拟维修作业过程中虚拟人需要不同的手势对各种工具进行灵活操作，针对该问题提出了从模型中重构手势的思想，并给出了一种新的关节角提取算法。

Aiming at this problem, an approach of hand posture reconstruction from models was introduced and a new algorithm of extracting hand gesture joint angles was introduced.

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