This paper is dealing with fundamental forms and causes of tooth breaking of a mining machine. Preventives for tooth breaking of gear are discussed as viewed from design and manufacture.

对采矿机械齿轮断齿的基本形式和断齿原因进行了分析，从设计制造角度提出了避免齿轮断齿的措施。

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This paper researched the program design method to control the pages of man-machine interface according to the control forms of automatic cone face grinder.

文章结合锥面自动磨床的控制方式，研究人机界面页面控制程序的设计方法。

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