| 摘要 |
A cylinder head 1, in which a plurality of boss parts 22, 23 are set up adjacent to each other, is provided with oil flow channels 36, 39 formed between adjacent boss parts 22, 23, and notched parts 50, 60 that are formed by cutting out at least parts of the boss parts 22, 23 and that expand the flow channel widths of the oil flow channels 36, 39. |
