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| 年代断定 | |||
| 测年 | |||
| 确定年代 | |||
| 年代测定 | |||
| 年龄测定 | |||
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| 时代鉴定; 地质年代测定; 年龄测定 | |||
| 确定使用寿命 | |||
| 年代测定; 測年; 測定年代; 測年計划 | |||
| age dating: 10 phrases in 5 subjects |
| Desert science | 1 |
| Engineering geology | 1 |
| Oil / petroleum | 2 |
| Technology | 4 |
| United Nations | 2 |
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