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| распространение в тропосфере; тропосферное распространение (радиоволн) | |||
| тропосферное распространение | |||
| распространение радиоволн в тропосфере | |||
| propagation troposphérique: 6 phrases in 2 subjects |
| Radio | 5 |
| Technology | 1 |
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