| ReturnTo Theme-Group-Choice | Onelevelup |
| 5K054 | Details of transmission, special-medium transmission system | |
| H04B1/00 -1/00,296;1/30;1/59;1/72;11/00-13/02 | ||
| 5K054 | Details of transmission, special-medium transmission system | |
| H04B1/00 -1/00,296;1/30;1/59;1/72;11/00-13/02 | ||