| |||
| 应答装置; 应答器 | |||
|
answer unit : 4 phrases in 4 subjects |
| Communications | 1 |
| Information technology | 1 |
| Technology | 1 |
| Telecommunications | 1 |
| |||
| 应答装置; 应答器 | |||
|
answer unit : 4 phrases in 4 subjects |
| Communications | 1 |
| Information technology | 1 |
| Technology | 1 |
| Telecommunications | 1 |