travelling wave | |
earth.sc. | onda progressiva |
oscillograph | |
nat.sc. | oscilógrafo |
tech. el. | vibrógrafo |
| |||
onda progressiva |
travelling-wave: 15 phrases in 6 subjects |
Antennas and waveguides | 1 |
Communications | 2 |
Electronics | 8 |
Natural sciences | 2 |
Radio | 1 |
Vacuum tubes | 1 |