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在对ＭＧ系列采煤机井下使用情况充分调研的基础上，采用故障树分析法对其主油泵故障及原因进行分析，提出提高主油泵可靠性的措施和方法。
Based on the full investigation of downhole usage of MG series shearers, fault tree analysis method was used to analyze the failure of the main oil pump and the reason, and the measures and methods to improve the reliability of the main oil pump were put forward.