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| tubo de rayos X con rejilla | |||
| tubo electrónico para redes | |||
| grid tube: 10 phrases in 7 subjects |
| Earth sciences | 2 |
| Electronics | 2 |
| Health care | 1 |
| Measuring instruments | 1 |
| Nuclear physics | 1 |
| Rail transport | 2 |
| Technology | 1 |
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