交流信号 | |
tech. | alternating current signal |
传信 | |
busin. | message |
el. | signaling |
telecom. | signaling |
DPA系统 | |
pest.contr. | DPA System |
F系统 | |
rem.sens. | F system |
PELV系统 | |
el.mach. | PELV system |
SELV系统 | |
el.mach. | SELV system |
TN-C 系统 | |
IT | TN-C system |
| |||
alternating current signal |
交流信号 : 12 phrases in 9 subjects |
Air defense | 1 |
Aviation | 1 |
Electronics | 1 |
Information technology | 2 |
Nautical | 1 |
Radio | 1 |
Space | 1 |
Technology | 3 |
Telecommunications | 1 |