| 摘要 |
In a header pipe for use in a heat exchanger composed of a header pipe body, both ends of which are closed, and a heating medium pipe, one end of which is connected to the header pipe body, on an outer circumferential surface of the header pipe body, there is formed a connecting opening which is open in an axial direction of the header pipe body, and one end portion of the heating medium pipe is inserted into the connecting opening.
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