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voice-frequency multiplex
| telegraphy
| voice-frequency multiplex | |
| IT el. | puhetaajuusmultipleksi |
| telegraphy | |
| commun. | telegrafia |
| |||
| puhetaajuusmultipleksi | |||
| voice-frequency multiplex: 1 phrase in 1 subject |
| Communications | 1 |