On the basic of mechanism analysis, this paper deduces the mathematics model of heat transfer of shallow buried underground engineering.
在分析浅埋工程围护结构传热机理的基础上，给出浅埋工程围护结构传热的数学模型。
The mechanism of heat transfer is analyzed. The application situation of bimetal rolled fintube is recommended emphatically.
分析了翅片管的传热机理，重点介绍了双金属轧制翅片管的应用情况。
Presents the core part structure, heat and mass transfer mechanism, and application conditions of the heat exchanger.
介绍了板翅式换热器的芯体结构、传热传质机理、适用条件。
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