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| impurity | |||
| alloy contamination; contamination by residual elements | |||
| pulp and paper contrary; contraries | |||
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| companion elements; impurities | |||
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impurezza : 80 phrases in 11 subjects |
| Antennas and waveguides | 3 |
| Chemistry | 14 |
| Communications | 1 |
| Earth sciences | 3 |
| Electronics | 46 |
| Health care | 5 |
| Information technology | 1 |
| Medical | 1 |
| Metallurgy | 2 |
| Semiconductors | 2 |
| Textile industry | 2 |