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main loading or discharging line; main oil pipe; oil main line | |||
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main fuel line |
主 油管 : 20 phrases in 7 subjects |
Automobiles | 3 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 1 |
Metallurgy | 1 |
Oil / petroleum | 2 |
Shipbuilding | 3 |
Technology | 9 |