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| 目视指示器; 直观显示器 | |||
| 有色指示剂 | |||
| 指示剂; 目测指示器; 玻璃液面计 | |||
| 可视指示器; 视觉指示器; 指示灯 | |||
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visual indicator : 46 phrases in 8 subjects |
| Air defense | 4 |
| Aviation | 25 |
| Electronics | 6 |
| General | 3 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Space | 1 |
| Technology | 5 |
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