| E25-CIDOC - This class comprises physical features that are purposely created by human activity, such as scratches, artificial caves, artificial water channels, etc. |
| E25-CIDOC - This class comprises physical features that are purposely created by human activity, such as scratches, artificial caves, artificial water channels, etc. |
| E25-CIDOC - This class comprises physical features that are purposely created by human activity, such as scratches, artificial caves, artificial water channels, etc. |
Class(MAN-MADE-FEATURE partial PHYSICAL-MAN-MADE-THING
PHYSICAL-FEATURE)