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| triods | |||
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| triode | |||
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triodes : 48 phrases in 12 subjects |
| Antennas and waveguides | 17 |
| Automated equipment | 1 |
| Chemistry | 2 |
| Communications | 1 |
| Computers | 1 |
| Earth sciences | 1 |
| Electronics | 16 |
| General | 1 |
| High energy physics | 1 |
| Mechanic engineering | 1 |
| Semiconductors | 3 |
| Technology | 3 |