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compound pump; dual pump |
复式 泵 : 56 phrases in 12 subjects |
Automobiles | 2 |
Chemistry | 1 |
Construction | 1 |
Drilling | 5 |
Ecology | 2 |
Electronics | 1 |
Engineering geology | 2 |
Hydroelectric power stations | 2 |
Metallurgy | 3 |
Nuclear and fusion power | 1 |
Oil / petroleum | 2 |
Technology | 34 |