| 摘要 |
A first element 41 and a second element 42 are disposed in postures such that the length directions of the elements are parallel to each other. The first element 41 is disposed in a posture such that a pair of opposing surfaces 41C, 41D where a longitudinal flow passage F3 is open is parallel to one main plate 22. The second element 42 is disposed in a posture such that a pair of opposing surfaces 42D, 42D where a longitudinal flow passage F4 is open is parallel to the one main plate 22. A mixing flow passage M1 formed as a result of the first element 41 and the second element 42 being disposed with a gap therebetween in a facing direction D1 of side plates is provided between a transverse flow passage F1 of the first element 41 sand a transverse flow passage F2 of the second element 42. |
