| 摘要 |
A central part of a columnar body in an axis direction parallel to inlet-side flow passages 70H in and outlet-side flow passages 70H out includes a first region R 1 where the number of outlet-side flow passages 70H out adjacent to each inlet-side flow passage 70H in is N io1 (N io1 is any natural number) and a second region R 2 where the number of outlet-side flow passages 70H out adjacent to each inlet-side flow passage 70H in is N io2 (N io2 is any natural number) and N io2 ‰ N io1 is satisfied. The outlet-side flow passage 70H out is not adjacent to another outlet-side flow passage 70H out , at the first region R 1 and the second region R 2 in the central part of the columnar body in the axis direction. |
