This article introduces the auto modular technology, then makes modular design according to the principle of modular product design and the characteristics of bus door switch.

在简述了汽车模块化技术的基础上，以模块化产品设计的原理，就公交车车门开关存在的缺陷进行模块化的设计。

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According to the characteristics of the product manufactured by HYDAC company (West Germany), we advise consumers how to select and use the accumulator more economically and reasonably.

通过分析西德hydac公司的产品特点，指导用户如何更经济、合理地选择和使用蓄能器产品。

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The tension controlling model of coilers are rebuilt according to the product characteristics and the man-machine platform is added.

根据产品特点，在开发中重新建立了卷取机张力控制模型，增设了卷取人机界面；

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