code sign
| structure
| code sign abbr. | |
| gen. | marque conventionnelle |
| structure abbr. | |
| gen. | ouvrage d'art |
| chem. | constitution; architecture |
| IT | structure physique; structure de mise en page |
| med. | vue de |
| pwr.lines. | support |
| textile | organiser |
| transp. avia. | cellule d'aéronef; cellule |
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| marque conventionnelle | |||
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code sign : 8 phrases in 3 subjects |
| Aviation | 5 |
| Communications | 2 |
| Construction | 1 |