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| κρυσταλλική ακαθαρσία; ξένο άτομο; χημική ακαθαρσία; ποσοστιαία περιεκτικότης χημικών ακαθαρσιών | |||
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impureza química : 4 phrases in 2 subjects |
| Chemistry | 3 |
| General | 1 |
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