| 摘要 |
A plate-shaped casing member includes: a first member made of a metal material, the first member including a through hole, a first half-through hole having an opening in a first main-surface side around the through hole, and a second half-through hole having an opening in a second main-surface side around the through hole; and a second member made of a material, the second member extending over the first half-through hole, the through hole, and the second half-through hole in the first member, and the second member being bonded to the first member. |
