abertura angular
| vertical
| abertura angular | |
| nat.sc. | ouverture angulaire |
| vertical | |
| life.sc. tech. | verticale |
| |||
| ouverture angulaire | |||
|
abertura angular : 10 phrases in 4 subjects |
| Communications | 4 |
| Electronics | 2 |
| Lighting other than cinema | 1 |
| Transport | 3 |