pilot balloon
| plotting board
| pilot balloon | |
| earth.sc. | ballon-pilote |
| plotting board | |
| automat. | enregistreur graphique |
| |||
| ballon-pilote m | |||
| ballon-sonde m; ballon d'essai | |||
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pilot balloon : 7 phrases in 3 subjects |
| Life sciences | 4 |
| Technology | 1 |
| Transport | 2 |