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本文介绍了汽轮机进汽球三通(ZG20CrMo铸钢)大面积铸造缺陷的挖补工艺。修复的三通已安全运行17.5万小时。
This article describes the steam turbine into the balloon tee (ZG20CrMo cast steel) large casting defects digging process. The repaired tee has run 175,000 hours safely.