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提出了目前CAD应用中进行二次开发的必要性和重要性。并介绍了针对矿山机械设备的计算机辅助设计开发系统，展示了该行业机械设计及设备维护与管理的一个发展方向。
The necessity and importance of secondary development in the current CAD application are put forward. And introduced the computer aided design and development system for mining machinery and equipment, demonstrating the machinery design and equipment maintenance and management of the industry a direction of development.