以下为句子列表：
英文: In the deducing process, no specific flow mode is presupposed, and the conclusion of temperature subtracting by the same side for logarithmic mean temperature difference can be easily drawn.
中文: 推导过程无需假定冷热流体的特定流向，并利于得到对数平均温差“同侧相减”的规律。
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英文: Mean temperature difference for countercurrent flow and cocurrent flow in steady continuous heat transfer has been deduced uniformly.
中文: 摘要采用统一的方法对定态传热逆流和并流的平均温差进行了推导。
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