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。
2
The utility model provides a cable connector assembly, comprising a vertical long shape insulating body, a terminal module, a shielding casing and a plurality of cables.
本实用新型提供了一种线缆连接器组件，包括纵长形绝缘本体、端子模块、遮蔽壳体及若干线缆。
3
Casting mould casing and core, coating for refractory material, refractory insulating material, special refractory material.