The system can save insulating cost and reduce heat loss using heat-exchanger in well bore and casing heat-exchanger on surface.

该系统采用采水井内换热器和地面套管式换热器，既可节省保温费用，又可减少散热损失。

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Heat Mirror's excellent insulating performance can keep temperature difference between two sides of spacing layers, thus reduce heat dissipating and accumulating on the inner surface of the glass.

热镜优异的保温性能使温差保持在中空层的两侧，从而减少内片玻璃的热量散失或积累。

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An inorganic heat-resistant insulating film (32) is formed on at least a part of a surface of the dust core (31) which faces a winding wire (12).

在压粉磁心(31)中的与线圈(12)对向的面的至少一部分上，形成有无机类的耐热绝缘被膜(32)。

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