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1问题的提出合肥铸锻厂目前承担着为合肥叉车总厂1～3t叉车配套的桥壳铸件生产任务，并计划将其出口日本TCM滋贺工厂等处，以期打进国际市场。叉车桥壳工作条件恶劣。按规定，在正常生产过程中，必须定期抽样进行台架试验，以检查疲劳寿命指标，确保产品质量。为确保产品质量上
1Problem raised Hefei Casting and Forging Plant currently undertakes the task of producing axle housing castings for 1 ~ 3t forklift trucks in Hefei Forklift Plant and plans to export them to Japan’s Shiga Plant and other places in order to enter the international market. Forklift axle housing poor working conditions. According to regulations, in the normal production process, must be regularly sampled bench test to check the fatigue life index to ensure product quality. To ensure product quality