Firstly, the main types of repairing defects of gearbox steel castings are counted, including casting defects and repairing and regenerating defects. Through the analysis of the causes of casting defects and repairing defects, specific preventive measures are formulated to fundamentally reduce the occurrence of defects and repairing times. Thus, the defect repair rate of gear box steel castings can be reduced and the casting cost can be saved.<br>
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