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| digital recording equipment | |||
| digital recorder | |||
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数 字记录仪 : 25 phrases in 10 subjects |
| Aviation | 4 |
| Earth sciences | 5 |
| Electronics | 6 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geology | 1 |
| Geophysics | 3 |
| Mechanics | 1 |
| Mining | 2 |
| Oil / petroleum | 1 |
| Technology | 1 |
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