 |
| |||
| 同位层 | |||
| 同期地层; 同位地层 | |||
| 等量层; 等效层 | |||
| equivalent layer: 8 phrases in 5 subjects |
| Aviation | 1 |
| Bridge construction | 2 |
| Engineering geology | 2 |
| Oil / petroleum | 2 |
| Technology | 1 |
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