| 摘要 |
The heat exchanger consists of two tubes (1, 2) welded to each other, connected to the return line of a heating plant. A further tube (3) is integrated between these tubes to transport the return water to the top end of the heat exchanger. This return tube is curved round the inner chimney tube (4). There are two screw points at the bottom for water connections to the input and output lines.
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