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| заградительные огни; маркировочные огни; светосигнальное обозначение препятствий; световое сигнальное обозначение препятствий | |||
| световое обозначение препятствий | |||
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balisage des obstacles : 4 phrases in 2 subjects |
| Aviation | 3 |
| Technology | 1 |
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