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test pit | |||
pilot well; proving well | |||
test hole; test well | |||
experimental well; observation well | |||
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experimental well |
试 验井 : 58 phrases in 11 subjects |
Drilling | 3 |
Earth sciences | 2 |
Engineering geology | 4 |
General | 1 |
Geophysics | 3 |
Hydroelectric power stations | 1 |
Metallurgy | 2 |
Mining | 2 |
Oil / petroleum | 24 |
Space | 2 |
Technology | 14 |