以下为句子列表：
英文: After the transformation of the shift flow to the total low-temperature shift process, the steam consumption per ton of ammonia drops remarkably, but the resistance in the catalyst beds increases rapidly.
中文: 摘要将变换流程改为全低变工艺后，吨氨蒸汽消耗明显下降，但触媒床层阻力迅速上升。
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