| 摘要 |
Heat exchanger having a double tube, in particular for the preparation of service water in heating systems, e.g. central heating systems, which can be assembled from one or more individual elements. Each individual element (A) essentially consists of at least one helix (2) of the double tube (1) and at least one pair (6, 7) of longitudinal tubes (8, 9; 10, 11) having connecting elements. <IMAGE>
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