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| 电子正时; 电子点火正时 | |||
| 电子计时 | |||
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electronic timing : 21 phrases in 10 subjects |
| 3 | |
| Automobiles | 10 |
| Aviation | 1 |
| General | 1 |
| Geophysics | 1 |
| Shooting sport | 1 |
| Space | 1 |
| Sports | 1 |
| Swimming | 1 |
| Technology | 1 |
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