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| trin | |
| constr. | round; rung |
| electr. | stage |
| estad. educ. | second level first stage; second level second stage |
| industr. | stage change point; step change point |
| micr. | step |
| transp. | entry step |
| transp. constr. | steps |
|
1-trins : 3 a las frases, 2 temas |
| Electrónica | 2 |
| Física nuclear | 1 |