| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger which is improved in an efficiency by winding a pipe around a combustion section. SOLUTION: In the heat exchanger, in which a pipe is wound around the combustion section for generating heat by burning a fuel and a tube, through which the heat, generated in the combustion section, is conducted to flow, waste heat is utilized through improving efficiency, by winding the pipe of the heat exchanger around the combustion section.
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