以下为句子列表：
英文: After implementing the said measures, tube-burst ratio due to over-temperature of the heating surface has reduced from 34.8% to 15%, occurrence ratio of said leakage accidents due to improper repairs has also greatly decreased, but leakage times resulting
中文: 实施后，受热面超温爆管比例从34.8%下降至15%，因检修不良而造成的“四管”泄漏发生率也有大幅下降，但因焊接缺陷和受热面材质造成的泄漏次数却明显上升。
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英文: In retrofit, measures of not varying the main body and changing over to use membrane economizer for enhancing wear-resistant capability of the heating surface have been taken.
中文: 改造采取主体不变，改用膜式省煤器的措施来提高受热面的耐磨性。
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英文: This paper analyzes the impact of the variation of coal proportion on flying-ash erosion in heating surface at the rear of coal-fired boiler.
中文: 研究了配煤比例变化对燃煤锅炉尾部受热面飞灰磨损的影响。
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