(subclass ReadOnlyMemoryDataStorage DigitalDataStorageDevice) | Media.kif 766-766 | ReadOnlyMemoryDataStorage 是 DigitalDataStorageDevice 的 subclass |
(subclass CDROM ReadOnlyMemoryDataStorage) | Media.kif 1170-1170 | CDROM 是 ReadOnlyMemoryDataStorage 的 subclass |