F-layer
| propagation
| F layer | |
| agric. | horizon F |
| commun. | couche F |
| radio | région F |
| propagation | |
| agric. | multiplication |
| biol. | reproduction |
| chem. | extension |
| construct. | cheminement; expansion |
| ling. | diffusion |
| nat.res. | dispersion |
| patents. | dissémination; mise en circulation |
| |||
| horizon F | |||
| couche F | |||
| région F | |||
| |||
| couche de fermentation; couche F | |||
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F-layer : 5 phrases in 3 subjects |
| Communications | 3 |
| Electronics | 1 |
| Information technology | 1 |