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| position control system | |||
| 位置控制系统: 14 phrases in 10 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Aviation | 1 |
| Chemistry | 1 |
| Earth sciences | 1 |
| Electronics | 3 |
| Metallurgy | 2 |
| Military | 1 |
| Space | 1 |
| Technology | 2 |
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