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对250dm~3高炉鼓风机组增速机齿轮的断裂进行了检验和分析,认为Al_2O_3夹杂是造成齿轮疲劳断裂的主要原因。
The crack of gear of gearbox of 250dm ~ 3 blast furnace blower unit was tested and analyzed. It is considered that the inclusion of Al_2O_3 is the main reason of gear fatigue fracture.