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动态联结 |
drill -down : 27 phrases in 9 subjects |
Drilling | 9 |
Engineering geology | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 1 |
Hydroelectric power stations | 1 |
Mining | 2 |
Oil / petroleum | 3 |
Technology | 7 |
Textile industry | 2 |