loop signalling
| system
| loop signalling | |
| commun. IT | slingsignalering |
| system | |
| earth.sc. mech.eng. | termodynamiskt system |
| el. engl. | system |
| |||
| slingsignalering | |||
|
loop signalling : 2 phrases in 2 subjects |
| Information technology | 1 |
| Telecommunications | 1 |