| 摘要 |
A ventilation structure (100) comprises a metal case (10) and a ventilation member (30). The metal case (10), which requires ventilation, has a ventilation hole (12) and a hole-surrounding section (14). The ventilation hole (12) is closed off by the ventilation member (30). The hole-surrounding section (14), which is a section surrounding the ventilation hole (12), is subjected to an alumite treatment, a Veluscudo treatment, a chrome-plating-on-aluminium treatment, or an oil repellent treatment. |
