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| instable layer; unstable layer | |||
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不稳 定层 : 22 phrases in 9 subjects |
| Bridge construction | 1 |
| Drilling | 2 |
| Earth sciences | 3 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Mining | 1 |
| Oil / petroleum | 2 |
| Technology | 8 |
| Wind Energy | 2 |
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