bay filler panel（扩展槽挡板）是什么意思？音标发音+图解场景

扩展槽挡板 /ˈbeɪ ˈfɪlə ˈpanəl/ n

English: bay filler panel · 扩展槽挡板

释义：Standard-sized panel covering an unused compartment through which electronic hardware can be added.

这个词出现在以下图解场景（1）