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| sistema de referencia | |||
| sistema de coordenadas | |||
| English thesaurus | |||
| |||
| anchor frame (ssn); reference picture (ssn); frame of reference (ssn) | |||
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reference frame : 13 phrases in 6 subjects |
| Economics | 1 |
| Electronics | 6 |
| Meteorology | 2 |
| Physical sciences | 1 |
| Satellite communications | 1 |
| United Nations | 2 |