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| origin of measurements | |||
| 测量源: 37 phrases in 11 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Earth sciences | 5 |
| Ecology | 1 |
| Electronics | 7 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 1 |
| Geophysics | 2 |
| Oil / petroleum | 2 |
| Space | 2 |
| Technology | 13 |
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