| 摘要 |
PROBLEM TO BE SOLVED: To improve heat recovery efficiency with a simple structure in a flow passage switch type multi-pipe type heat recovery apparatus. SOLUTION: In this multi-pipe type heat recovery apparatus, an annular cooling medium passage 9 extending to an axial direction is constituted by an intermediate cylinder 4 fixed to an inner surface of an outer cylinder. COPYRIGHT: (C)2006,JPO&NCIPI
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