 |
| |||
| private automatic branch exchange; business exchange; business telephone exchange; business telephone system; office exchange; private branch exchange | |||
| abonnentvaxel: 28 短语, 2 学科 |
| 电话 | 1 |
| 通讯 | 27 |
|
| |||
| private automatic branch exchange; business exchange; business telephone exchange; business telephone system; office exchange; private branch exchange | |||
| abonnentvaxel: 28 短语, 2 学科 |
| 电话 | 1 |
| 通讯 | 27 |