The fixture has the characteristics not only to satisfy variety of manufacturing requirements for mechanical parts but to simplify the operation and increase the efficiency, too.

该夹具不仅可满足多种机型制造工艺的要求，而且具有操作简便、提高效益等特点。

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Safety and easy operation: hidden air leaking hole for opening fixture cover easily while pulling up hand lever of the upper cover.

操作方便，安全：隐藏式泄气孔，拉起上盖把手即可打开治具，操作简易，安全性高。

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Finally, the math model of positional restriction of assembling fixture, arithmetic for assembling operation and fixture assembling technology based on restriction are discussed.

论述了组合夹具位置约束的数学模型、组合操作的算法和基于约束的夹具组装技术。

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