| |||
private exchange | |||
Subscriber Switch | |||
private branch exchange | |||
private automatic branch exchange |
用 户交换机 : 38 phrases in 9 subjects |
Aviation | 1 |
Business | 1 |
Communications | 1 |
Computer networks | 1 |
Electronics | 12 |
Hydroelectric power stations | 1 |
Space | 2 |
Technology | 3 |
Telecommunications | 16 |