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| 勘探程序 | |||
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| 勘探程序 | |||
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program of investigation : 5 phrases in 3 subjects |
| Earth sciences | 1 |
| Hydroelectric power stations | 1 |
| Technology | 3 |
| |||
| 勘探程序 | |||
| |||
| 勘探程序 | |||
|
program of investigation : 5 phrases in 3 subjects |
| Earth sciences | 1 |
| Hydroelectric power stations | 1 |
| Technology | 3 |