以下为句子列表：
英文: The contract stress on supporting roller and crawler board surface of three models of Dong Fang Hong crawler tractor under three working conditions is gained by finte element analysis, as well as the stress distribution law and maximum stress which provid
中文: 摘要对3种机型拖拉机的支重轮与履带板之间的接触应力分别在3种工况下进行了有限元分析，得出接触应力分布的规律及其最大值，为解决支重轮和履带板的塑性变形问题及摩擦磨损行为分析提供了有价值的参考数据。
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英文: The effect of supporting roller's hardness and loads on the roller was investigated by the mean of reasonable wear experiment in laboratory, wear mechanisms of supporting roller was researched and observation of their worn surface by scanning electron mic
中文: 摘要采用试验室试样磨损试验方法，在合理的实验条件下，考查了支重轮硬度及外加载荷对磨损量的影响，用扫描电镜观察试样磨损表面形貌并分析其磨损机理。
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