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| surface condition | |||
| surface state | |||
| character of the surface | |||
| surface finish | |||
| surface texture | |||
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etat de surface : 21 a las frases, 9 temas |
| Ambiente | 1 |
| Aviación | 5 |
| Ciencias de la vida | 1 |
| Derecho laboral | 1 |
| Electrónica | 3 |
| Metalurgia | 3 |
| Recursos naturales y conservación de la vida silvestre. | 3 |
| Tecnología | 2 |
| Transporte | 2 |