| |||
| 交換機, 交換ユニット; 交換ユニット; 交換施設; 交換局 (kōkankyoku) | |||
|
switching unit : 5 phrases in 3 subjects |
| Electric traction | 1 |
| Technology | 1 |
| Telecommunications | 3 |
| |||
| 交換機, 交換ユニット; 交換ユニット; 交換施設; 交換局 (kōkankyoku) | |||
|
switching unit : 5 phrases in 3 subjects |
| Electric traction | 1 |
| Technology | 1 |
| Telecommunications | 3 |