| English | eng-000 |
| useful area | |
| 普通话 | cmn-000 | 有效断面 |
| 普通话 | cmn-000 | 有效面积 |
| Deutsch | deu-000 | Nutzfläche |
| English | eng-000 | active area |
| English | eng-000 | clear opening |
| English | eng-000 | effective area |
| English | eng-000 | floor space |
| English | eng-000 | significant area |
| русский | rus-000 | полезная площадь |