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| 门电子管; 选通管 | |||
| 选择管; 闸门管; 闸管; 选通〔闸门〕管 | |||
| gate tube: 21 phrases in 4 subjects |
| Electronics | 3 |
| Hydraulics | 1 |
| Hydroelectric power stations | 4 |
| Technology | 13 |
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